Cheap And Discounts Heat Melt Insert Nut Iron Tip Brass Hot Melt Inset Nut Tool Embedded Kit M2 M3 M4 M5 M6 M8 Heat Insertion for 3D Printer Plastic Wholesale. Buy Directly From Merchant A Salted Fish Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.