The is an official VW item. Often broken or missing the is seat glide bush was fitted in the seat mounting rails from factory on VW T25 T3 Vanagon vans. Without it you will find your passenger seat will rattle when nobody is sat in it and move around a little and the drivers seat will not work as nice.
Also fitted to square fronted LT vans and fits Bay window models.
One per seat fitted from factory.
Replaces part number 251881213