This is an auxiliary fuel tank!
This a hanging, gravity feed, 1 liter capacity, with a screw on lid, includes fuel line, and shut off petcock with all clamps.
We got these primarily for those people wanting to purge their ATV with regular pre mix gas, after running alcohol or methanol fuel
We use one for our drag Yamaha Banshee, simply hang it from the handlebars, and it works great!
The fuel reservoir is about 8" tall, and 4" wide, just for reference.