• Food-Grade & BPA-Free: Made from high - quality injection - molded TPE, safe for your food and beverage projects.
• Excellent Fit: With a 3/8 inch hole, top diameter of 1.34 inches (34 mm), bottom diameter of 1.06 inches (27 mm), and length of 1 inch (25 mm), it fits carboys perfectly.
• High - Temperature Resistance: Can withstand a max temperature of 158 °F (70 °C). Easily turn it into a solid stopper with a #000 solid stopper (FE400).

These rubber stoppers are great for homebrewers and DIY beverage makers. You can use them with 1 - gallon glass carboy jugs for fermentation or storage. They're made of food - grade materials that are BPA - free. The stopper has a top diameter of 1.34 inches, bottom diameter of 1.06 inches, and is 1 inch long. It can handle temperatures up to 158 °F, making it a reliable choice for your projects.