40mm overall diameter, the dome height is 9mm. The lip on the round edge would keep your speaker(coils) sealed and stop the dust and humidity. Made of high grade paper. Strong enough to resist scratch and stretch. Application. Dust cap protective dome is one of the audio maintenance or repair parts for speaker, woofers, subwoofer, and coils. Installation. Remove the defect cap carefully (Use a tweezer, tape or hook, do not hurt the coils) and clear the bonded circle. Gluing and attaching a suitable new cap to finish the work.
40mm Audio Speaker Dust Cap Coil Cover Overall Diameter: 40mm(1.5') Height: 9mm Material: Paper Shape: Dome Application: Dust cap protective dome is one of the audio maintenance or repair parts for speaker, woofers, subwoofer, and coils. Installation: Remove the defect cap carefully (Use a tweezer, tape or hook, do not hurt the coils) and clean the bonded circle. Gluing a circle around the coil base on the cap's size, attaching the new cap to cover the coil and make sure it was sealed. Remove the remaining glue when everything is good. Package Content: 2 pcs 40mm Audio Speaker Dust Cap