Stopper 2-Hole Rubber 28mm 24mm 5.5 21lb ,Each

Details:

Stopper 2-hole rubber 28mm 24mm 5.5 21Lb^ 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: 5.5, Top diameter: 28 mm, bottom diameter: 24 mm, 21lb