This is a very easy to assemble 7-piece kit. All you’ll need is some adhesive (We like CA), an X-Acto knife, some fine sandpaper, and black paint! The wheels can be mounted parallel to the body so that the conveyor simulates a front to back movement. Or you can make it with the wheels mounted perpendicular to the body to simulate a swivel movement. There are two wheel choices. Please specify whether you want spoked metal wheels or general purpose tires. The measurements of our large conveyor are as follows: length of conveyor body is 7"; the height of piece when built-up is 4 1/2" high and the width of the piece with wheel set is 1 3/8". Our large conveyor is designed based upon research on conveyors that loaded steam switcher tenders in smaller yard facilities that did not contain large coaling stations.