These Schumacher Racing Products shims are designed to precisely set the mesh and positioning of the 20-tooth bevel gear in the CAT L1 EVO drivetrain. Each shim measures 0.5mm thick, allowing builders to dial in gear engagement with fine accuracy. The pack contains 4 metal shims, providing enough spares to set up multiple vehicles or replace worn shims during maintenance. Features: 0.5mm thickness for precise gear mesh adjustment Designed specifically for the 20T bevel gear Pack of 4 shims Metal construction 7/7/26 cs