For replacing the support pad in case of wear or because you just want a different color.
There are differences in the current plastic support pads and older pads. The outer holes on the bottom in the current are larger than those of the old ones.
Only trays with the larger holes are available. Do you have an old plastic pad with four small holes and you want to replace it, you can also order for a plastic pad. New pads fit on the older plastic pads as well, but have less grip.
For installation download the PDF: Ergorest Armschaal Vervangen.