Check the listing for details. Roller Guitar String Tree Guides Retainer Chrome Pack of 10 LM2. Condition: New. Listed at 11.49 USD. Description: 100% brand new and high quality The rollers on them can lessen the stress on your strings, which allows the guitar to stay in tune longer They also can prevent wear and tear on the strings, which results in longer string life Compatible with electric guitar and bass Base Size (L x W): Approx. 0.43 x 0.23 inch / 11 x 6mm Total Height: Approx. 0.47 inch / 12mm (including the roller) Roller Size (L x D): Approx. 0.4 x 0.2 inch / 10 x 5mm String Spread (Center to Center): Approx. 0.27 inch / 7mm Material: Zinc alloy Color: Silver/Black/Gold Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: Guitar String Retainers x 10PCS On Oct-17-21 at 19:55:04 PDT, seller added the following information: