fuses, High Speed, North American Style, Brand Or Series: Class Rk1, Type: Blade, Amp Rating: 250 Amp, Voltage Rating: 600 Vac/300 Vdc, Interrupting Rating: 200000 Amp Vac Rms Symmetrical, Dimensions: 2 19/32 Diameter X 11 5/8 Length Inch,features: Fast