SPL 12-04 is 316 stainless steel push in male elbow fitting connecting 12mm O.D PU, PA, PE, teflon tubing to R 1/2 female thread by 90°. 12mm x R 1/2 male elbow SUS pneumatic fittings have a 316 SUS body, with SUS collet & FKM( viton) seal, making it withstand harsh, corrosive environment.