This is a 5 x 20mm fast-acting glass tube fuse. The GMA Series.
I actually hate these fuses and I wish Coleman used a more standard fuse you could purchase at Walmart, Lowes, Home Depot or ever auto part stores. It is almost like they want you to purchase the fuses from them? LOL
I actually believe it was…. Home Depot who had them last time I needed one. But…. they only had 2-4. One time I had to rewire to another inline fuse. When you have a short it usually takes more then one fuse to find the problem! LOL