... 2.type:Single&Double flared stainless steel sleeve. 2.3.Various size. JINYOU stainless sleeve pipe fittings1. Very easy of installing. ... JINYOU 304stainless steel sleeves sizeSingle Single flared stainless steel sleeve Size DIA 12,14,16,18,20,25,32MM ... Double flared stainless steel sleeve Size DIA 12,14,16,18,20,25, ... water, and heating ect. Double &single flared type pipe fittings--Sleeve