1.medium auto plug-in fuse , car fuse , blade fuse 2.Zinc-blade 3,Aluminum-blade 4, ... blade fuse)mini type amp available:2A 3A,4A 5A,7.5A,10A,15A,20A,25A,30A,35AMedium type amp available ... :2A 3A,4A 5A,7.5A,10A,15A,20A,25A,30A,35A,40AMax type amp ...