Name: USA interchange adaptor(universal coupler, combo coupling); Body: 1/4"; Thread size: 1 / 4 ... 8", 1 / 2"; Name: USA interchange adaptor(universal coupler, combo coupling); Body: 1/4"; Thread: NPT (National Pipe Thread ... 3 / 8", 1 / 2"; Coupler type: Universal type, combo type, 3 in 1 type; Surface treatment: Zinc plated; Working ... thread test. Interchange Adaptor(Universal Coupler, Combo Coupling)