Size 7 Green Neoprene Rubber Stoppers are Tapered Rubber Stoppers that will plug bottles, lab vials and other openings. Manufactured from Neoprene Rubber. Neoprene Rubber is suitable to a temperature of 275 degrees F and suitable for use with petroleum products, minerals, oils and fats.
Good stopper, quick shipping, good price
I got my stoppers very quick after my order. Just as ordered. Good quality. I'm happy with my purchase.