Package Contents: You will receive 4 pieces of dog nail grinder replacement heads, which can be used interchangeably for longer life. Product Material: Our replacement parts are made of solid brass shaft and diamond wheel, the brass shaft has high stability, and the diamond wheel is strong and wear-resistant. Product Advantages: These replacement heads can be cleaned with water after removal, just wipe dry. Provides the best paw trimming for your dog's nails. The nail grinder replacement head has a solid brass shaft for longer life and greater stability. Nail grinder heads are easy to clean, remove the grinding head from the Nail Grinder and clear and clean. Easy To Use & Install: These dog nail grinder replacement heads are easy to install, just remove the old and insert the new, make sure it is firmly inserted when installing. Colour:Gray Material:diamond Size:21x13mm Package Contents: 4 * Dog Nail Grinder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!