Stopper 2-Hole Rubber 68 mm 58 mm 13 4lb ,Each

Details:

Stopper 2-hole rubber 68 mm 58 mm 13 4lb^ rubber stopper, 2 hole, color: black, contain a high percentage of pure rubber and weigh less than neoprene, resilient/pliable for a long time, low in free sulfur, can withstand adverse laboratory, size: 13, top diameter: 68 mm, bottom diameter: 58 mm, 4lb