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#11 stopper - with 3/8 inch hole. Top diameter 2.17 inches (55 mm), bottom diameter 1.89 inches (48 mm), length 1 inch (25 mm).
BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet.
To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole.
Max. Temperature Rating: 158 °F (70 °C).