22 Pack Solid Rubber Stoppers 000# -7# – Tapered Laboratory Test Tube Stopper Pl
Rubber Stoppers: High quality rubber with excellent sealing and close fit. 10 Assorted Sizes: #000, #00, #0, #1, #2, #3, #4, #5, #6, #7. For flask, test tube or other laboratory applications. 5pcs #000 (13/8mm x 21mm).