Stopper 1-Hole Rubber 19mm 14mm 1 52lb , Each

Details:

Stopper 1-hole rubber 19mm 14mm 1 52lb^ 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: 1, top diameter: 19 mm, bottom diameter: 14 mm, 52l