... experience,high quality, competitive price. 2.type:Single&Double flared stainless steel sleeve. 2.3.Various size. ... leak-proof water, good strength, long life . 4. Double o-ring seal, contributing greater security. 5. Antielectrolysis ring ... DIA 12,14,16,18,20,25,32MM Double flared stainless steel sleeve Size DIA 12, ... sanitary hot water, and heating ect. Double &single flared type tube fittings--Sleeve