Review on Rig Rite 150 Watertight Marine by Brian West

I recently purchased a Rig Rite Manufacturing 150 waterproof marine fuse holder with 8 gauge wire and 50 amp fuse and recommended replacement fuses. The fuse holder came with a 1 1/4" long, 3/16" diameter fuse. The fuse was 32 volts, 50 amps. Additional replacement fuses suggested by Amaozn were gold plated db link AGU50 50 amps. These fuses are 1 1/2" long and 3/8" in diameter and absolutely do not fit in the built in fuse holder. I believe the fuse holder will work fine, my problem is getting the right size 12 volt, 50 amp. circuit breaker.