Littelfuse Sealed In-Line ATO® and Mini Fuse® Holders are automotive products designed to allow easy installation of fusing into potentially wet or dirty environments outside of the cab. Littelfuse Sealed In-Line Fuse Holders are designed for use with 1A to 30A ATO or 2A to 30A MINI fuses. These fuse holders come with twin 8″ red GXL wire leads for easy in-line installation.