The Hot Racing Losi® Micro-B™ Reef Aluminum Servo Saver Set is an optional upgrade designed for the Losi Micro-B when using the Hot Racing Losi® Micro-B™ 6061 Aluminum High Speed Chassis Conversion (HRALMCB14HL01 – sold separately). Precision CNC-machined from high-quality aluminum, this servo saver set offers improved strength and precision with an anodized finish that adds a professional appearance.