This is the Waterproof Micro Servo for use on the Traxxas 1/16 E-Revo and Slash VXL Vehicles.FEATURES:- Waterproof- Blue nylon caseOn Waterproof Micro Servo with standard connectorSPECS: Length: 29.5mm (1.2")Width: 14mm (0.55")Height: 29mm (1.1")