NEW!! 4 stud Enclosed Busbar. 4 x 10mm studs. Rating: 300Amps. Material: Nickel plated brass, stainless steel studs and screws. Busbar supplied with glass fibre reinforced box. Each box features 6 removable windows in the cover for easy cable entry and exit. Box dimensions: 45mm H x 138mm W x 69mm D.