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.

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

Pack of two test tubes.

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

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!

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