Stopper 1-Hole Rubber 63mm 50mm 11.5 6lb ,Each

Details:

Stopper 1-hole rubber 63mm 50mm 11.5 6Lb^ 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: 11.5, Top diameter: 63 mm, bottom diameter: 50 mm, 6lb