#8 natural latex rubber stopper with 3/8 inch hole. Top diameter 41 mm, bottom diameter 33 mm, length 25 mm.
3-Piece airlocks from Buon Vino. Simply remove the cap, fill the cylinder about halfway (to the imprinted line) with water or sanitizer, and replace the cap. 3-piece airlocks are easy...
Large plastic airlock for stainless steel variable capacity tanks, or other containers with a thin lid. Features a threaded shaft with back nut and washer.