TI E Series expansion valve Anticorrosion and rust-proof stainless steel power head Offers different injection to match different application Big membrane design makes valve control more sensitive Attached with washable and removable inlet filtering meshwork Four use on Refrigerants R134a, R22, R404A&R507 Inlet connection size is 3/8"SAE Outlet connection size is 1/2"SAE Maximum working pressure of 450 psig