... high quality,superior performance and competitive price 3 pieces connector set : • Features:3,4,7 pieces for ... tubes.have brass sleeve(insert), cutting ring(ferrule), nut,connector. • Materials:Iron,brass. • Fit size:¢5,¢6 ... molding machine. Brass Insert: other name--socket ,tube support, copper washercutting ring: other name--Ring, Sleeve, ferrule -----------------------------------------------BlueMob. ...