1/10 scale off-road fuel/gas canister. Two mounting options - straight through (you'll need an M2x18mm or so - total height is about 12mm) or using the circular disc and mounting to your truck/surface first; then mount the fuel canister. You'll need 4 x M2x10mm screws for mounting and one M2x8mm for the top clasp.
There are two fuel canister models, one with the fuel cap separated and one with it attached. Allows for quick printing either way. You'll need supports under the cap when printing and I'd stand up all the mounting bits, they print better that way in my experience.