Description: The RC transmitter steering wheel controller is made of high quality aluminum alloy material, sturdy and durable, long service time.Perfect designs,the index finger operates the to control forward and backward, the thumb operates the steering, and controls the left and right directionsCNC processing, anodic oxidation treatment, convenient take photos while playing, easy to install, durable.Suitable for 39.5-42mm diameter steering wheel.Designed for SCX10 for TRX4 TRX6 1/10 RC crawler. Specification: Material: Aluminum AlloyDiameter:39.5-42mm/1.56-1.65inch Package Includes: 1 Piece RC Transmitter Steering Wheel Controller Note: 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 on-line shopping!