There is nothing worse than spending the night in an RV and blowing a fuse and having nowhere else to buy another fuse! This set of three 30 amp fuses eliminates that problem. Fuses can blow for a number of reasons, including surges, overloads, and the like. They happen and you have to be prepared for them. Keep such spare parts on hand in case of unforeseen circumstances. We also stock 15 amp fuses. *If you found my review helpful, please let Revain know by clicking the 'HELPFUL' button below! A simple five star rating and an honest and heartfelt recommendation!