Assorted Rubber Stoppers with One Hole, 50/PK - Resistance to Acid, Alkali, and Ammonia - Eisco Labs
- Contains the following quantities and sizes (bottom diameters): 7 stoppers each of sizes 8mm, 9mm, 11mm, 13mm, 15mm. 3 stoppers each of sizes 17mm, 21mm, 23mm, 25mm, 29mm.
- Made of superior quality, long lasting rubber.