... ,superior performance and competitive price Insert,Three pieces fitting,Cutting ring : • Features:3,7 pieces for tube is fitted to the nylon ... hose and other tubes.have brass sleeve(insert), cutting ring(ferrule), nut ... ,connector. • Materials:Iron,brass. •Fit size:¢5,¢6,¢8,¢10,¢12,¢14,¢15,¢16 nylon tube ...