Quantity 1 = Lot of 6 Gas/Fuel barrels, so if you buy one quantity you are getting a set of 6. These are custom made pieces that are wooden train track compatible and close to identical to the original wood versions. They are sturdy and made of ABS hard hat plastic like Lego Brand uses. My sons use some with their wooden train track barrel loader set and they have held up well. These barrels were designed to fit the Thomas train barrel train cars and Thomas Train barrel loader, but they could be used as cargo for other train sets (they are about an inch thick). Also, my sons have played with theirs in the bathtub so I know they are water proof and they float as an added bonus :). These are printed off of a 3D printer. (The other toys/train cars/barrel loader in the photos are not for sale and were used for scale and so buyers can see the fit, you are only getting the two Fuel barrel pieces if you bid.) Ruler not included. Feel free to ask questions. I do offer returns within 14 days if you are not satisfied. This item is from a smoke free home. If you have any concerns upon arrival, please contact me before leaving feedback so that I can take care of the problem first. Thank you for reading my ad and have a great day!