EV West Fuse Holder Size 1 are glass-filled polycarbonate or laminated phenolic insulator blocks designed to accommodate bolt-in fuses. All studs, clips and mounting hardware are tin or zinc plated. They are rated up to 600 volts and are extremely well built. These do not have cover protection, so they should only be mounted in a protected connection box. Current Rating: 400 Amps AC/DC Voltage Rating: 600 Volts AC/DC Post Stud Size: M8 Post Center to Center: 2.06 Inches Height: 2.2 Inches Length: 3.2 Inches Width: 0.78 Inches UL Rated: Yes Warranty Period: One year Click Here for Manufacturer's Dimensional Drawing Click Here for EV West EV Fuse Block Data Sheet Click Here for EV West EV Fuses Data SHeet