Ball and socket quick coupling 1. material:galvanized carbon steel 2. size:2",3",3-1/2",4",6",8" 3. connected with male Basic ... a history of 16 years* have 10 years' export experience and 3 years' import experience* explorees: more than 200 Sales Focus:* quality ... /S3.parts: male tail, female tail, lever ring and rubber ring4.size: 2", 3", 3-1/2",4",6",8"5.advantage: safe ...