Stopper 2-Hole Rubber 103mm 83mm 15 1lb ,Each

Details:

Stopper 2-hole rubber 103mm 83mm 15 1lb^ 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: 15, top diameter: 103 mm, bottom diameter: 83 mm, 1lb