Stopper 1-Hole Rubber 45mm 37mm 9 9lb , Each

Details:

Stopper 1-hole rubber 45mm 37mm 9 9lb^ 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: 9, top diameter: 45 mm, bottom diameter: 37 mm, 9l