This is the Waterproof Micro Servo for use on the Traxxas 1/16 E-Revo and Slash VXL Vehicles. FEATURES: Waterproof Blue nylon case YOU WILL RECEIVE: One Waterproof Micro Servo with standard connector REQUIREMENTS: Installation on the vehicle SPECIFICATIONS: length: 29.5mm (1.2") width: 14mm (0.55") height: 29mm (1.1") cnh 6/26/09 ir/jxs &