Features： 1、300A bus bar box with 5/16in M8*4 terminal studs. 2、Module box design for easy wiring configurations. Removable windows for unobstructed wiring. 3、Widely applied to 12-48V car, trucks, RV, marine, boat power systems. 4、The base is made of brass and stainless steel, sturdy and anti-rust. The bus bar box is made of nylon and is glass fiber reinforced, strong and safe, durable to use. 5、Easy to mount, screws fixation, firm and stable. Specification： Features: 300A bus bar box with 5/16in M8*4 terminal studs. Module box design for easy wiring configurations. Removable windows for unobstructed wiring. Widely applied to 12-48V car, trucks, RV, marine, boat power systems. The base is made of brass and stainless steel, sturdy and anti-rust. The bus bar box is made of nylon and is glass fiber reinforced, strong and safe, durable to use. Easy to mount, screws fixation, firm and stable. Specifications: Working Voltage: DC 12V-48V Max Operating Voltage: DC 48V Max Continuous Current: 300A Terminal Stud Size: 4 x M8（5/16in） Material: Glass Fiber, Nylon, Brass, Stainless Steel Color: Red Item Weight: 364g/12.8oz Package Weight: 391g/13.8oz Item Size: 13.8*6.9*4.5cm/5.4*2.7*1.8in Package Size: 14.5*7.5*5.5cm/5.7*3*2.2in Package List: 1*Bus Bar Box 4*Screws(small size) 4*Screws(large size) Package List： 1*Bus Bar Box 4*Screws(small size) 4*Screws(large size)