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【Powerful & Precise Cooling System】This high-capacity 60-amp relay kit delivers robust and reliable cooling performance for your vehicle. Compatible with 10, 12, 14, and 16-inch electric fans, it efficiently prevents engine overheating. The integrated temperature switch (activates at 185°F, shuts off at 175°F) ensures your engine maintains an optimal operating temperature, reducing wear and enhancing overall performance. 【Premium Materials for Longevity】 Engineered for durability, the kit features an IP65 waterproof and dustproof housing with sealed terminals and rubber grommets. Constructed with a high-quality 60-amp SPDT relay, built-in diode, and tinned copper wiring, it resists oxidation and ensures stable operation in moisture, mud, or dust—perfect for cars, trucks, boats, and off-road vehicles. 【Complete All-Weather Protection Package】Safeguard your electrical system with the included 20-amp inline waterproof fuse holder and a durable, waterproof fuse clip. This design provides critical protection against overloads and short circuits, guaranteeing that your cooling fan and other accessories operate reliably in extreme weather and challenging driving environments. 【Simplified Installation with User-Friendly Wiring】EASY WIRING Color-labeled wires:10 Feet 12 Gauge RED wire -to + 12VDC, 6 Feet 12 Gauge BLUE wire -to Electric Fan Positive, 6 Feet 18 Gauge YELLOW wire -to lgnition or Fan Switch, 6 Feet 18 Gauge GRAY wire -to Thermostat Switch Sending Unit. The temperature sensor comes with a 3/8 line and a 1/2 adapter for flexible installation into cylinder heads or water jackets. 【Versatile Dual-Relay Design for Multiple Applications】Its professional single-pole double-throw (SPDT) relay design offers exceptional versatility. It can be configured as a dual cooling fan relay or used for other 12V automotive applications like fuel pumps. This makes it an ideal, heavy-duty solution for upgrades, conversions, or replacing old, unreliable cooling system components. Model 104101 Brand Name FASTSTORM Item Weight 1 Pounds Part Number 104101 Contact Type Normally Open Manufacturer FASTSTORM Mounting Type Socket Mount Connector Type Plug-In Current Rating 40 Amps