brand new and high quality Features: Highest amperage rated bus bar (300A) with M8/M10 terminal studs Glass fiber reinforced nylon base and enclosure ensures great mechanical strength and durability. Heavy-Duty module box design for easy wiring configurations. Blank write-on space on the top allows easy labeling for each branch. 4 studs , Removable for windows for unobstructed wiring. Specification: Material: Brass, Nickel plated Base & Cover Material: Nylon, Glass Fiber reinforced Color: Black Max Operating Voltage: for DC 48V Max Amp per circuit: Determined by wires connected Terminal Stud Size: 4*M8 (0.31in)/4*M10(0.39in) Size: 13.5*7*5cm / 5.31*2.75*1.97in Product Weight: 369g / 13.01oz Note:1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Package includes: 4 * Studs 4 * Screws 1 * Distribution Box