This is a custom made step for tight spaces where a ramp would be too long. It is best suitable for a medium size dog (@50lbs). It is made of light weight aluminum. The top step (if used) rests on the seat which should be between 23 - 26" high, when measured from ground level. When not in use it folds up (19"W x 23"H x 14"D) and can be stored in your trunk, etc. Please text or call 250-418-0433 to arrange pick-up.