Cheap And Discounts 10 Packs/Box 21/25/31mm 15-40 Dental K-FLEXOFILE Flexibility Endo Root Canal K Files SSt Hand Use Dentist Endodontic Instruments Wholesale. Buy Directly From Merchant Shop1102751903 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.