The Petego EB K9 Keeper is a new and innovative headrest-mounted universal dog guard. Its adjustments for width and height make it suitable for almost all vehicles with rear head rests, and it's certainly the fastest and easiest guard to fit and remove that we've seen - not more than a couple of minutes. If your car hasn't got adjustable rear seat headrests, this dog guard won't fit - please don't order it! As well as fitting almost all vehicles, i.e. being particularly good value for money, it doesn't impede the normal use of a fixed or rolling parcel shelf / boot blind - that's a unique feature of a well designed headrest-mounting guard. Almost as important in our experience is that the K9 Keeper doesn't rattle - one of the irritating bugbears of many dog guards. It's a one piece welded construction with no potential for metal on metal vibration. It has a neutral grey colour for reduced visual impact. The K9 Keeper is held in place with only two brackets, well protected to prevent damage to either the headrest posts or the K9 Keeper. Position the K9 Keeper centrally against the back of the rear headrest posts, hook a clamp around one post on each side, and tighten; it's that simple. The guard adjusts from 25cm high (with the top bar removed) by 85cm wide to a maximum 49.5cm high by 150cm wide. The top bar is easily removed if there is not enough headroom - many cars have limited headroom in the boot space. Will fit to headrest posts that are between 45.5cm and 74cm apart. Please be aware that you may need to remove the central headrest to fit this dog guard. If your car has three headrests, please ensure that the central one is removable before ordering. Additional fitting notes: Use the rectangular guide bar to position the guard centrally on top of the back seat, then secure it to two headrests by tightening the holding brackets around two headrest posts - an easy one handed operation. Once the guard is in place the horizontal bars should be adjusted so they don't quite touch the edge of the vehicle, and then given a quarter turn which locks them in position. Removing the guard is as easy as fitting it - just loosen off the tightening knobs and remove from the headrest posts.