Push in fitting with PT & NPT(PST- male run tee fitting) Thread: Inch thread, Metric thread, NPT, PT, BSPP As a Fitting manufacturer ... : Brass nickeled plating, Plastic, POM, Stainless steelThread: Inch thread, Metric thread, NPT, PTColor of sleeve: Blue, Red, Black, GrayShape ... sealing.Various models are available in both inch and metric sizes. Push in fitting with PT & NPT(PST-male run tee fitting)