Feature: Material:Zinc alloy and Brass Rollers. Excellent quality chrome replacement electric guitar bridge with locking posts. Fully adjustable saddles for harmonics with smooth working rollers,complete with locking posts and allen key. Size:84.5 x 17mm String Spacing:10.3mm Color:BLACK/CHORME/GOLD Package Content: 1 x Roller Saddles style Tune-O-Matic Bridge.