Stopper 1-Hole Rubber 127mm 90mm 16 1lb ,Each

Details:

Stopper 1-hole rubber 127mm 90mm 16 1lb^ 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: 16, top diameter: 127 mm, bottom diameter: 90 mm, 1lb