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 $8.50. All orders sent via Priority Mail.

Stoppers are individually priced with no minimum quantity.

For all orders for rubber stoppers refer to: http://www.grauhall.com/xcart/customer/home.php?cat=2 . 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.

For all orders for amber latex rubber tubing refer to: http://www.grauhall.com/xcart/customer/home.php?cat=12 .

For all orders for rubber bulbs and other goods refer to: http://www.grauhall.com/xcart/customer/home.php?cat=64 .

Click here for physical description of stoppers and product numbers