Feature:1. Made of highquality materials, perfect designs, make the transmitter to be controlled by onehanded, release the right hand.2. Convenient take photos while playing, easy to install, and operate the remote control with one hand.3. CNC processing, anodic oxidation treatment, easy to install, durable.4. A 40mm diameter steering wheel is suitable, meeting your demands.5. Transmitter steering wheel trigger, designed for traxxas TRX4 1/10 RC crawler.Specification:Condition: 100% Brand NewItem Type: Transmitter Steering Wheel TriggerMaterial: Aluminum Alloy Color: Black Red Inner Diameter: Approx. 40mm / 1.6inFitment: Fit for traxxas TRX4 1/10 RC Crawler .Package List:1 x Transmitter Steering Wheel TriggerNote:1. Please allow 13mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.