Stopper 1-Hole Rubber 90mm 75mm 14 1lb , Each

Details:

Stopper 1-hole rubber 90mm 75mm 14 1lb^ rubber stopper, 1 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: 14, top diameter: 90 mm, bottom diameter: 75 mm, 1l