APPLICATION RANGE Extension pipe fittings can be used with brass, copper and iron pipes in industrial environments, suitable for cooling systems of injection molding machines, die-casting machines and other equipment.DURABLE DESIGN Hard iron material, strong and durable, strong impact resistance. Double threaded joint, deep and uniform thread, tight connection of pipe fittings.PACKAGE INCLUDE 1 Pack of Pipe Fitting, which size is Thread Size NEED ATTENTION It is recommended to use rubber sealing gasket connection, the connection effect is better (not included here). Please attention the product size before placing an order.