As stated by the maker or seller. Specs can change between versions and sellers; confirm on the listing. We did not test this product.
From the maker
WHAT’S INCLUDED You'll receive a 1-gallon wide mouth Fermonster carboy made from durable PET plastic with an airtight screw-on lid. Includes a #10 drilled stopper and twin bubble airlock—ready for fermentation right out of the box.
IDEAL FOR PRIMARY FERMENTATION Designed for small-batch fermenting, this 1-gallon plastic fermenter creates an airtight seal to help prevent oxygen exposure. Ideal for wine, beer, mead, cider, and experimental brews.
WIDE MOUTH & EASY TO CLEAN Wide mouth opening and smooth, rib-free interior make cleaning simple and help prevent residue buildup. Easier to maintain than traditional narrow-neck glass carboys.
OUR COMMITMENT TO YOU At FastRack, we stand behind the quality of our products and the trust our customers place in us. Your experience matters. If your order arrives damaged or incomplete, reach out—we’ll make it right.
Glass carboys breakGlass carboys can break and cut. Use a good carboy handle and always support the bottom when you move a full one; a crate or carrier under the base helps on slippery floors. Never pour hot wort into cold glass. PET and stainless avoid the risk.Source: Craft Beer & Brewing: Homebrew safety