bauer coupling is made of carbon steel with hot zinc ... 1/2",4",6",8" advantage: safe, fast, easy, flexible in the same range some other items: T joint, Y ... strainer, pipe galvanized and non-galvanized similar couping:perrot coupling, ferrari coupling application:irrigation, mining and tunneling, civil engineering project,emergency ... the drawings or samples. hot zinc plated bauer coupling with hose tail