The 210mm is strange because during the mk3 era they changed the PP and flywheel a little. It's described in the mk3 Bentley. Basically just keep the PP and flywheel for the same car year. Just keep an eye open for that.
There are single pin and dual pin flywheels, I ran into that.
thats a great price on that clutch kit, another 50 bucks to get the fly wheel resufaced and you're good to go.