[Strong Materials] This product is made of nylon, polycarbonate housing, nickel-plated copper bus bars, safe to use. It has low resistance, maximum conductivity, high temperature resistance, and wear resistance. 4-terminal bus bar helps organize and clear wiring clutter for all types of electrical and ground distribution. [With Dust-Proof Cover and Stainless Steel Studs] The cover is clear, fire and dust resistant for added extra protection against accidental contact. Environmentally friendly flame retardant nylon base material has good mechanical strength and durability. Stainless steel studs and screws are rust-resistant and adaptable to environments. [Wide Application] This product is suitable for cars, pickups, trailers, trucks, RVs, RVs, motorcycles, caravans, yachts, boats and more. The 4 position single row bus bar provides a neat and clean surface for any installation in a boat or car, perfect for all electrical wiring projects. Maximum voltage:300V AC/48V DC continuous rating:130A AC/150A DC Terminal screw:M6 x 2 binding post:M6 x 2 Colour:Black & Red Material:Nylon+Metal Size:4.72x0.79x1.69inch Package Contents: 1 x Black Base 4 Screw Terminal Power Distribution Block 1 x Red Base 4 Screw Terminal Power Distribution Block 4 x Mounting Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.