Stopper 2-Hole Rubber 37 mm 30 mm 7 13lb ,Each

Details:

Stopper 2-hole rubber 37 mm 30 mm 7 13lb^ 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: 7, top diameter: 37 mm, bottom diameter: 30 mm, 13lb