Coupling sleeves R32 ,R22,R25,R28,R38,T38,T45,T51full-brigge,semi-bridge,same diameter,adapter coupling, TypesandvickNo.Specification(Length)R38-R38 R38-170T38-T387314-3355T38-190T45-T457315-3663T45-210T51-T51 T51-235R32-R32 R32-150T38-R38 R38-T38T38-R32 R32-T38R38-R32 R38-R32T45-T38 T38-T45R32-R32F R32-R32 Coupling Sleeve for rock drill