This model is used for E5 series circuit breakers to be put together, making installation easier and simpler, making the line safer and more tidy. The bracket material nylon is flame retardant, heat resistant, anti-aging, anti-corrosion, Busbar material Copper, thickness 1.2mm, can withstand large current 180A, good electrical conductivity. Applicable scene: truck, truck, yacht, RV power system. Specification: Material: Plastic and Metal Voltage:48 VDC Current: 180A (Max) Total length: Approx 283mm (11.14) Width: Approx 23.2mm Height : Approx 23.3mm Thickness of copper : Approx 1.2mm length of copper: Approx 220.3mm (8.67), width: Approx 14.3mm(0.56) Package Includes: 1 Piece Circuit Breaker 1 Piece Holder Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture car