Felt Diffraction Ring for Tweeters
Black felt with adhesive on one side that sticks to tweeter face plate. The diffraction ring can help stop the initial reflection from the tweeter dome off of the cabinet face.
People find them useful to cover an aftermarket tweeter that may not fit perfectly like the original, like using a round tweeter to replace a square one.
111mm (4.37") OD
41mm (1.61") ID