Cheap And Discounts HENGXIN 16 11 ER EL IR IL NPT American National Pipe 60 degree Carbide Internal External Thread Insert CNC Lathe Tools Holder Wholesale. Buy Directly From Merchant HengXin-Practical Factory Store Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.