All stocked MEGA fuses will fit the MEGA holder. Select an Amp rating slightly above the maximum current moving through the fuse but below the wire's maximum rating.
For example, if moving 120 Amps at peak power, use 125 Amp fuse and wire rated for at least 130 Amps. That way everything will operate normally, but in a short-circuit condition the fuse will blow before equipment/wiring is damaged.
MEGA Fuse, 80-400 Amps
We have a no-questions-asked return policy within 30 days for items that are unused and in good enough condition to be re-sold. Buyer must pay shipping, except on defective items. After 30 days a 15% restocking fee will be applied.