Highest amperage rated bus bar (300A) with M8( 5/16") terminal studs ( also available in M10). Module box design for easy wiring configurations. Glass Fiber reinforced Nylon base and enclosure ensures great mechanical strength, very durable. The removable windows is for unobstructed wiring, and they can be disassembled according to your needs. Blank write-on space on the top allows easy labeling for each branch. Specification: Base & Cover Material: Nylon, Glass Fiber reinforced Bus Material: Brass, Nickel plated Max Continuous Amp: 300A Max Operating Voltage: DC 48V Terminal Stud Size: 4x M8 (5 /16") Model: F3607-R Applicable Models: 12-48V dc car, RV, , yacht Weight: 360g Size Chart: 1386944.5mm/5.432.721.75inch Package Includes: 1 Piece Power Distribution Block 8 Pieces screws Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you 3. Wish you a wonderful on-line shopping