One-handed Control Adaptor Transmitter Steering Wheel Trigger Thumb Lever for NB4 / Noble Lite / Upgrade Quality aluminum alloy, CNC machined Black/red/ anodized Allow for easier one-handed driving Works with for Noble NB4, Noble Lite and NB4 PRO Specification: Item: Transmitter Thumb Lever Compatibility: for NB4, Noble Lite, NB4 PRO Material: Metal Weight: 8.8g/0.31oz Mounting Hole: 7mm(square ) Color: Red Scope of application: applicable to TQi Transmitter 6530 Fine workmanship: fine workmanship, looks very beautiful. Easy to use,Easy to replace Package Contents: 1 x RC Upgrade Parts kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.