Dimensions: Bus Bar Box:(L x W x H): 138 x 69 x 44.5mm (5.433x2.72x1.75inch); Stud size: M8 (5/16").

Material: Copper nickel plated plate with stainless steel studs and nuts, red positive busbar and black negative(ground) busbar as a pair.

Easy installation: Four mounting holes make this bus bar box easier to be mounted in any orientation; removable windows makes wiring unobstructed.

Waterproof and Dustproof: Comes with four removable side plates, a insulated rear cover, rainproof and dustproof, and resist erosion from air and sea water.

Application: The 300A Heavy Duty Bus Bar makes the wiring of circuit neat and tidy and prevent electric from short circuit, suitable for automotive, car, truck, marine, boat, RV, etc.