Feature:1. ALUMINUM ALLOY MATERIAL: The 380 390 brushed motor heat sink is made of premium aluminum alloy, which is sturdy and rugged, rust and wear resistance and ensures excellent heat dissipation performance.2. EFFICIENT AND SAFE: The electric motor heat sink can effectively prevent the motor from overheating, providing safe and efficient work. Ensure precise control with the best possible efficiency.3. APPLICABLE MOTOR: Professional motor heat sink is suitable for 28mm/1.10in diameter motors (such as for 380 390 brushed motor, for 2838 2845 2850 brushless motor).4. APPLICABLE RC CAR MODELS: Professional electric motor heat sink suitable for HSP, for HPI, for Wltoys, for Himoto, for Redcat, for Traxxas and Other Brands 1/16 1/18 Model5. COMPACT DESIGN, EASY TO INSTALL: The motor heat sink is compact and lightweight, will not add burden to the RC toy. Easy to install, great replacement part for old or damaged parts.Specification:Item Type: Electric Motor Heat SinkMaterial: Aluminum AlloyColor: BlueApplicable: Approx. 28mm/1.10in Diameter Motor (Such as 380 390 Brushed Motor, 2838 2845 2850 Brushless Motor) (Applicable Models: for HSP, for HPI, for Wltoys, for Himoto, for Redcat, for Traxxas and Other Brands 1/16 1/18 Models).Package List:5 x Electric Motor Heat Sink