Need help identifying a Saeco SIN006 Part

Need help identifying a Saeco SIN006 Part

Received a Saeco Starbucks barista NEW IN BOX from 2003!! Feeling like I've won the lottery but im curious about a part I've never seen before. I think its for making drip coffee. Its a fabric basket that covers the entire head and has a rubber gasket to make it stay on. anyone ever heard of this??? is that what it is???