This is a Cork mat designed to fit all Pro-Ject series turntables, except Debut II and III models (the Debut Carbon and Debut S/E 3 are compatible). The use of Cork gives the mat special sonic qualities, well-suited to certain deck/cartridge combinations, and also different room-types.The use of cork rather than felt (which is more commonly found as a turntable mat) is actually preferred by some audiophiles, as cork causes less 'slip' effect under the record than felt does; allowing for a tighter performance.