Description: -The Precision CNC Anti Collar is designed to greatly reduce the slit between slot and linkage. It is designed to improve head performance on EFLITE MSR helicopters. -Silver annodizing version. Includes: -CNC Aluminum Anti Collar Requires: -Loctite (#242 is recommended) -Assembly Weight: 0.1g Usage: -EFLITE MSR helicopters Instruction: -Included in the package. Features: Precision CNC machined aluminum. Designed light weight, strong and stylish. Replace stock Anti Collar