Our univercal cover is also made by first CNC machining and then folding to shape. It is laying direct on the turntable's platter to keep dust of, it is centered by the spindle to keep the right position. Three bumpers keep a small distance between platter and cover.
The arm is protected against damaging but not fully against dust as air can still flow over the arm. Our universal cover will fit most turntables with 9 inch tonearm.