Description:High Quality Material: Guitar neck shims are made of premium solid brass for durable use to match the guitar neck. Functions: These shims were used to change the angle of a guitar neck to give more adjustment space. Thickness Size: There are 0.2mm(4Pcs), 0.5mm(2Pcs) and 1mm(2Pcs) guitar shims for electric guitar bass players. Easy To Use: The brass neck shims are durable and portable to install. Wide Applications: The guitar neck shims are suitable for most electric guitars and basses to protect musical instruments from corrosion or damage. Specification:Material: BrassSize Chart:Length: 5cm/1.97Width: 1cm/0.39inchThickness:0.2mm/0.01inch0.5mm/0.02inch1mm/0.04inchPackage Includes:4 Pieces 0.2mm Guitar Neck Shims2 Piece 0.5mm Guitar Neck Shims2 Piece 1mm Guitar Neck ShimsNote:1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping!