... such as Ridgid, Rex, Asada, 2)All kinds of Chinese threading machine dies availble we have dies as below:KSU 1 ... '2",11/2"-2"), 21/2"-3", 21/2"-4",5"-6"Rex in Metric, M8---M35Ridgid: 1/4"-3/8 ... ", 21/2"-3_,21/2"-4"Calm shell packing Pipe threading machine dies