Rubber Stopper, #2, 2-hole

You will always have the right size rubber stopper on hand with this 2 lb package of assorted solid, 1-hole and 2-hole stoppers ranging in size from #00 to #8. You get 60 stoppers total.

Pack of two extra large test tubes, 20 x 150 mm.

Handheld clamp holder for heating a single test tube over a flame.

These No. 2 rubber stoppers are 16-20 mm diameter with one 5 mm diameter hole.

These #3 rubber stoppers are 18-24 mm diameter with two 4 mm diameter holes.

Pack of two test tubes.

These solid No. 2 rubber stoppers are 16-20 mm diameter.

Get lab glass test tubes in three sizes: small, large & extra-large. The large and extra-large borosilicate test tubes comes in packs of two, while the small come in packs of six. Bulk pricing discounts apply for them all!

These # 6.5 rubber stoppers are 27-34 mm diameter with two 5 mm diameter holes.

5mm glass tube fit in all rubber stoppers & attach to 4.8 mm plastic or rubber tubing. Pack of two.