... 16 inch),φ16(5/8 inch),φ19(3/4 inch),φ22(7/8inch),φ26(1 inch),φ31(1 7/32 inch),φ39(1 17/32 inch),φ ... 46(1 25/32inch),φ52(2 inch ... ),φ63(2 1/2 inch)*Operation ... the metal cover size .Remark:(for example ,for 1 inch and 4 layer hose ,the outer skin diameter is ...