Guaranteed good quality Niti Filexible Hand Use Root Canal K-Files Dental Files 15#-40# Feature: Root Canal K-Files 1. Designed to clean out the dentin and make root canals smooth 2. To give operators smooth tactile sense insice the root canal 3. With diamond-shaped cross section 4. Made of Niti Flexible and available of hand use and engine use 5. Recommended rotary speed of engine files:150~350r/min 6. Packed with 6pcs of files per box, available fo single or assorted sizes Specification: 1. Type: Hand use K-Files 2. ISO Size:10#, 15~40#, 45~80# 3. Length: 21mm, 25mm, 28mm, 31mm 4. Packaging: 6pcs per box, available of single or assorted sizes payment and tax 1.we can accept Alipay, Visa, Master Card etc 2.we not charge tax and insurance. shipment we often use UPS , DHL and others to ship, and it often takes 4 to 5 days.</p>