#8 natural latex rubber stopper with 3/8 inch hole. Top diameter 41 mm, bottom diameter 33 mm, length 25 mm.
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.
Bubbler, or S-shaped airlock. Includes plastic cap. Fill with water or sanitizer to the imprinted line, replace the cap, and insert into your fermenter. Ships unassembled (red caps seperate)