It also has the added benefit of a removable and lockable door under the base which comes with 2 keys and is ideal for storing all your valuables in while camping.
The base has been machined 30mm lower to counteract the rise in height found typically by the addition of a swivel plate, so if you want to fit a swivel to just your passenger side and want the seat to remain the same height as the drivers seat this is your answer. It comes with all nuts and bolts needed to fit as well.
Great value if you consider a used T5/T6 single seat base can be £80.00 without a swivel.