Stopper 2-Hole Rubber 26 mm 20 mm 4 28lb ,Each

Details:

Stopper 2-hole rubber 26 mm 20 mm 4 28lb^ 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: 4, top diameter: 26 mm, bottom diameter: 20 mm, 28lb