Size 7 - Neoprene Stopper w/ Hole - 37mm Tapering to 30mm

Green neoprene rubber stoppers have better aging characteristics than those of natural black rubber bottle stoppers and are resistant to oils, solvents, ozones and many hydrocarbons. The serviceable temperature range is from -40°F to +212°F. Neoprene rubber stoppers with 4mm hole to fit 1/4" swivel, 1" long.