The guitar body string mounting ferrules are made of fine steel. A set includes 6 string cap to fulfill your quantity needs. With the string cap,your electric guitar will have better sound effect. This is a necessary guitar accessory for electric guitar players. Professional and practical design with beautiful appearance,add a elegance to your guitar. Feature: GOOD MATERIAL:Great replacement for your old, broken ferrules.The guitar body string mounting ferrules are made of fine steel.FUNCTION:Make the strings vibrate more effectively, improve the resonance and increase the delay, make the sound stronger.PACKAGE INCLUDE:A set includes 6 string cap to fulfill your quantity needs.APPLICATION:Fits into the back of the body and locates/holds the strings. A very nice steel finishing look.ADD AN ELEGANT FEEL TO YOUR GUITAR:Professional and practical design with beautiful appearance,add a elegance to your guitar. Specification: Material:Steel Color:Silver/Black/Golden(Optional) Small Tip Diameter: 3mm Large Tip Diameter: 5mm(Inner) 8mm(Outer) Total Length: 12mm Insert Body Length: 5mm Package List: 6 x Guitar String Cap