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CURT Short-Lead Mini Fuse Bypass Switch for RV Dinghy Towing Model 58435 15-1/2" W F450 Super Duty and F550CURT Short Lead Mini Fuse Bypass Switch for RV Dinghy Towing Model 58435This short lead mini fuse bypass switch helps avoid having to remove and replace fuses when flat towing your vehicle. It is designed for vehicle specific application and integrates with CURT RV harnesses for a custom fit solution. It includes a bypass harness, fuse holder and other components.