Mfr Body Code: USK57; Internal Strainer Included OR Mfr Body Code: USK56; Internal Strainer Included OR Mfr Body Code: USK55; Internal Strainer Included OR Mfr Body Code: USK52; Internal Strainer Included OR Mfr Body Code: USK51; Internal Strainer Included OR Mfr Body Code: UPK56; Internal Strainer Included OR Mfr Body Code: UPK51; Internal Strainer Included OR Mfr Body Code: UPK50; Internal Strainer Included