The material is brass.The I.D. can be tailored by requirements.Used to connect conduit,box,pipe,tube and so on. Description:1.The material is brass.2.The inner diameter can be tailored according to the requirements of customers.3.The type can be inner teeth or outer teeth.4.It is usually used to connect distribution box,conduit,pipe,tube,hose and so on.Cat. No.SizeCCO-0503/41/2 ShortCCO-1001 ...