Universal Rubber Stopper - Size #6-7 (With Hole)

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You will love the versatility of this stopper! The Universal Stopper with Hole fits a 2.8, 3, 5, 6, or 6.5 gallon glass carboy. Also fits our 500ml Erlenmeyer flask, and can be fli pped over and used in most bottles! Made with a longer taper from a different material from standard stoppers to minimize popping out when wet. Please Note: This stopper will not fit in plastic carboys, Better Bottles or Speidel Plastic Fermenters. Show more