These swivel plates only fit VW T5 vans with single front seats. 

Kits include:

Swivel plate and bolts to fit standard VW seat boxes. 
Swivel plate mounts between your original seat bases and the original seat slider rails 
European TUV safety approval
Seat height increases by 43mm 
Automatically locks in place facing forward for driving 
These are not offset


Note: To rotate drivers seat the handbrake must be released momentarily, then re-engaged once the seat is facing the rear. For seats fitted with up/down height adjustment (that is most of them) you will find that you probably need to pump up the seat height to allow the seat to rotate without the grey plastic trim around the base catching on anything.