Black Rubber Stoppers

The stoppers which we offer are made of natural rubber with a carbon black filling. These are otherwise know as 'laboratory stoppers', but are useful for many other purposes such as plugging kayaks. With the addition of a glass tube through a center hole, they can adapt a variety of bottles to become hummingbird feeders. They are often used to plug tubing which is to be electroplated.

To order call us on our toll free number or email us at [grauhall AT cwnet DOT com] with card info and products desired and a phone number where you can be reached, or fax an order to us with that information to (916)379-9639 or send us a snail mail to Grau-Hall Scientific, 8524 Erinbrook Way, Sacramento, CA 95826.

Shipping charges are a flat $7.00. All orders sent via Priority Mail.

Stoppers are individually priced with no minimum quantity.

For bulk orders rubber stoppers are $17.00 per pound except where noted. The number of pieces per pound are approximate and vary from batch to batch. The number of pieces which you receive may be less than stated.

Item Price U/M Solid# pcs/# solid 1-Hole# pcs/# 1 hole

#000 0.15 each 3730101 (stock item) 175 3731101 (stock item) 208

#00 0.25 each 3730102 (stock item) 103 3731102 (stock item) 110

#0 0.35 each 3730103 (stock item) 76.8 3731103 (stock item) 79.5

#1 0.40 each 3730104 (stock item) 63.8 3731104 (stock item) 65.7

#2 0.50 each 3730105 (stock item) 54.6 3731105 (stock item) 58.1

#3 0.55 each 3730106 (stock item) 39.4 3731106 (stock item) 42.3

#4 0.60 each 3730107 (stock item) 33.5 3731107 (stock item) 35.1

#5 0.75 each 3730108 (stock item) 29.2 3731108 (stock item) 29.8

#5½ 0.80 each 3730109 (stock item) 25.3 3731109 (stock item) 26.3

#6 0.95 each 3730110 (stock item) 21.5 3731110 (stock item) 22.4

#6½ 1.05 each 3730111 (stock item) 18.5 3731111 (stock item) 18.8

#7 1.35 each 3730112 (stock item) 16.3 3731112 (stock item) 16.4

#7½ 1.45 each 3730113 (stock item) 13.6 3731113 (stock item) 14.3

#8 1.70 each 3730114 (stock item) 12.7 3731114 (stock item) 13.1

#8½ 1.90 each 3730115 (stock item) 11.0 3731115 (stock item) 11.3

#9 2.00 each 3730116 (stock item) 10.7 3731116 (stock item) 10.9

#9½ 2.20 each 3730217 (stock item) 9.61 3731217 (stock item) 9.96

#10 2.45 each 3730220 (stock item) 8.52 3731220 (stock item) 8.63

#10½ 2.75 each 3730121 (stock item) 7.25 3731121 (stock item) 7.34

#11 3.15 each 3730119 (stock item) 6.39 3731119 (stock item) 6.87

#11½ 3.65 each 3730122 (stock item) 5.26 3731122 (stock item) 5.32

#12 4.00 each 3730120 (stock item) 5.03

#13 4.40 each 3730123 (stock item) 4.23

#13½ 8.80 each 3730124 (stock item) 2.66

#14 10.95 each 3730125 (stock item) 1.63

#15 15.00 each 3730126 (stock item) 1.29

Click here for physical description of stoppers and product numbers

Shipping charges are a flat $7.00. All orders sent via Priority Mail.

Tubing sold in one foot units and multiples of feet.

Amber Surgical Latex Rubber Tubing

Inside diameter in inches Wall thickness in inches Outside diameter in inches Price per foot Item#

1/16 (.062) 1/32 (.031) 1/8 (.125) .85 3850109 (stock item)

1/8 (.125) 1/32 (.031) 3/16 (.187) .90 3850110 (stock item)

1/8 (.125) 3/64 (.047) 7/32 (.218) 1.05 3850111 (stock item)

1/8 (.125) 1/16 (.062) 1/4 (.250) 1.15 3850112 (stock item)

3/16 (.187) 1/16 (.062) 5/16 (.312) 1.30 3850113 (stock item)

3/16 (.187) 3/32 (.093) 3/8 (.375) 1.95 3850114 (stock item)

3/16 (.187) 1/8 (.125) 7/16 (.437) 2.55 3850115 (stock item)

1/4 (.250) 1/16 (.062) 3/8 (.375) 1.45 3850116 (stock item)

1/4 (.250) 3/32 (.093) 7/16 (.437) 2.25 3850117 (stock item)

1/4 (.250) 1/8 (.125) 1/2 (.500) 3.05 3850118 (stock item)

5/16 (.312) 1/16 (.062) 7/16 (.437) 1.85 3850119 (stock item)

5/16 (.312) 3/32 (.093) 1/2 (.500) 2.55 3850607 (stock item)

5/16 (.312) 1/8 (.125) 9/16 (.562) 3.50 3850601 (stock item)

3/8 (.375) Excellant for bagpipes. 1/16 (.062) 1/2 (.500) 2.10 3850701 (stock item)

3/8 (.375) 3/32 (.093) 9/16 (.562) 2.95 3850602 (stock item)

3/8 (.375) 1/8 (.125) 5/8 (.625) 3.85 3850708 (stock item)

1/2 (.500) 3/32 (.093) 11/16 (.687) 3.60 3850603 (stock item)

1/2 (.500) 1/8 (.125) 3/4 (.750) 4.95 3850604 (stock item)

3/4 (.750) 1/8 (.125) 1 (1.00) 6.05 3850605 (stock item)

Rubber Bulbs and other Rubber Goods

Item Description Price U/M Item#

Pipette filler - rubber with 3 valves Black 18.75 each 3631446 (stock item)

Blue 18.75 each 3631448 (stock item)

Red 18.75 each 3631447 (stock item)

Green 18.75 each 3631449 (stock item)

Latex rubber eye dropper bulb 1cc(1/30oz.) - beige 1/4 inch bore .40 each 3631107(stock item)

Natural rubber eyedropper bulb 1cc(1/30oz.) - black 1/4 inch bore .30 each 3631445(stock item)

Natural rubber syringe bulb 2cc(1/15oz.) - red 1/4 inch bore .35 each 3631109(stock item)

5cc(1/6oz.) - red 5/32 inch bore 3.70 each 3631112(stock item)

8cc(1/4oz.) - red 5/32 inch bore 2.05 each 3631113(stock item)

12cc(1/3oz.) - red 5/32 inch bore 2.30 each 3631114(stock item)

15cc(1/2oz.) - red 5/32 inch bore 2.40 each 3631115(stock item)

35cc(1oz.) - red 1/4 inch bore 3.20 each 3631116(stock item)

60cc(2oz.) - red 1/4 inch bore 3.55 each 3631117(stock item)

100cc(3oz.) - red 1/4 inch bore 8.10 each 3631119(stock item)

150cc(5oz.) - red 1/4 inch bore 12.70 each 3631120(stock item)

240cc(8oz.) - red 1/4 inch bore 18.10 each 3631121(stock item)

Gas Collecting Rubber Bulbs, 6mm bore with 2 PE valves and tubing on both ends 75cc 10.50 each 3631190

45cc 9.00 each 3631191

Rubber policemen for 3mm shaft 6.00 dozen 3631103 (stock item)

for 5mm shaft 6.00 dozen 3631104 (stock item)

for 5mm shaft - wing-style 14.00 dozen 3631106

Click on the triangle on the right to see a pull-down menu of laboratory supplies:

Inside diameter in inches	Wall thickness in inches	Outside diameter in inches	Price per foot	Item#
1/16 (.062)	1/32 (.031)	1/8 (.125)	.85	3850109 (stock item)
1/8 (.125)	1/32 (.031)	3/16 (.187)	.90	3850110 (stock item)
1/8 (.125)	3/64 (.047)	7/32 (.218)	1.05	3850111 (stock item)
1/8 (.125)	1/16 (.062)	1/4 (.250)	1.15	3850112 (stock item)
3/16 (.187)	1/16 (.062)	5/16 (.312)	1.30	3850113 (stock item)
3/16 (.187)	3/32 (.093)	3/8 (.375)	1.95	3850114 (stock item)
3/16 (.187)	1/8 (.125)	7/16 (.437)	2.55	3850115 (stock item)
1/4 (.250)	1/16 (.062)	3/8 (.375)	1.45	3850116 (stock item)
1/4 (.250)	3/32 (.093)	7/16 (.437)	2.25	3850117 (stock item)
1/4 (.250)	1/8 (.125)	1/2 (.500)	3.05	3850118 (stock item)
5/16 (.312)	1/16 (.062)	7/16 (.437)	1.85	3850119 (stock item)
5/16 (.312)	3/32 (.093)	1/2 (.500)	2.55	3850607 (stock item)
5/16 (.312)	1/8 (.125)	9/16 (.562)	3.50	3850601 (stock item)
3/8 (.375) Excellant for bagpipes.	1/16 (.062)	1/2 (.500)	2.10	3850701 (stock item)
3/8 (.375)	3/32 (.093)	9/16 (.562)	2.95	3850602 (stock item)
3/8 (.375)	1/8 (.125)	5/8 (.625)	3.85	3850708 (stock item)
1/2 (.500)	3/32 (.093)	11/16 (.687)	3.60	3850603 (stock item)
1/2 (.500)	1/8 (.125)	3/4 (.750)	4.95	3850604 (stock item)
3/4 (.750)	1/8 (.125)	1 (1.00)	6.05	3850605 (stock item)

Item	Description	Price	U/M	Item#
Pipette filler - rubber with 3 valves	Black	18.75	each	3631446 (stock item)
	Blue	18.75	each	3631448 (stock item)
	Red	18.75	each	3631447 (stock item)
	Green	18.75	each	3631449 (stock item)
Latex rubber eye dropper bulb	1cc(1/30oz.) - beige 1/4 inch bore	.40	each	3631107(stock item)
Natural rubber eyedropper bulb	1cc(1/30oz.) - black 1/4 inch bore	.30	each	3631445(stock item)
Natural rubber syringe bulb	2cc(1/15oz.) - red 1/4 inch bore	.35	each	3631109(stock item)
	5cc(1/6oz.) - red 5/32 inch bore	3.70	each	3631112(stock item)
	8cc(1/4oz.) - red 5/32 inch bore	2.05	each	3631113(stock item)
	12cc(1/3oz.) - red 5/32 inch bore	2.30	each	3631114(stock item)
	15cc(1/2oz.) - red 5/32 inch bore	2.40	each	3631115(stock item)
	35cc(1oz.) - red 1/4 inch bore	3.20	each	3631116(stock item)
	60cc(2oz.) - red 1/4 inch bore	3.55	each	3631117(stock item)
	100cc(3oz.) - red 1/4 inch bore	8.10	each	3631119(stock item)
	150cc(5oz.) - red 1/4 inch bore	12.70	each	3631120(stock item)
	240cc(8oz.) - red 1/4 inch bore	18.10	each	3631121(stock item)
Gas Collecting Rubber Bulbs, 6mm bore with 2 PE valves and tubing on both ends	75cc	10.50	each	3631190
	45cc	9.00	each	3631191
Rubber policemen	for 3mm shaft	6.00	dozen	3631103 (stock item)
	for 5mm shaft	6.00	dozen	3631104 (stock item)
	for 5mm shaft - wing-style	14.00	dozen	3631106