CARBIDE THREADING INSERTS SIZE RANGES ARE 11ER/16ER/22ER 11IR/16IR/22IR etc.. Items are ISO,A,AG,G,W,UN,NPT,ACME,API et ... , we also can produce non-standard carbide threading inserts, CNC inserts and grooving inserts.The performance of our insert can be as good as Tungaloy ... .Our carbide inserts sold very well in domestic market and indian market. It is best quality ,low price .We can satisfiy all ...