These swivel seat plates sandwich a special aerospace phenolic self lubricating nylon disk wear plate thereby making the swivel virtually maintenance free and absent of rattles or vibration often found with ball bearing roller designs requiring periodic replacement. These are the #1 selling seat swivels used by the majority of OEM European camper manufacturers and the DIY client.
Install the Swivel Adaptor. Then your original seat is remounted back on top. This will raise the overall seat height by 1.75 inches.
Ford Transit 2015+