Product:Coupling sleeves Thread:R22,R25,R28,R32 R38,T38,T45,T51 ... -bridge,semi-bridge,same diameter etc. A lot of types: Coupling sleeves R32 ,R22,R25,R28,R38,T38,T45,T51full-brigge ... ,semi-bridge,same diameter,adapter coupling, Coupling Sleeve TypesandvickSpecification(Length)No.R38-R38 R38-170T38-T387314-3355T38 ...