ATO 4 Amp Fuse Pink 5 Pack Fuses are critical for safety. They provide protection from electrical overloads in hundreds of places. Every boat should carry spare fuses for ever circuit on board. Critical equipment for communication and navigation, as well as convenience equipment such as stereos and sanitary facilities make boating safe and pleasant. Spare fuses ensure you are always connected. Fuses come bubble packed on colorful cards. Each has an inner, reusable storage box to keep spare fuses organized and accessible.