How thick is the 220mm interface pad (part number 577252) for the LHS 2 225 Planex Drywall sander?

The 577252 pad is approx 8mm thick.

This interface pad dampens the PLANEX LHS 2 225 application pressure when sanding very soft fillers. This creates perfect surfaces even on very soft substrates. ideal for use when sanding soft coatings on plaster board.