Stopper 1-Hole Rubber 26mm 20mm 4 28lb ,Each

Details:

Stopper 1-Hole Rubber 26Mm 20Mm 4 28Lb^ 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: 4, Top Diameter: 26 mm, Bottom Diameter: 20 mm, 28lb