Function: Car audio speaker spacer ring aid in audio speaker installation, play an important part in reducing resonance and making the speakers stronger. Replace new car speaker spacers adapter, provide better sound quality, fixed speakers to reduce door resonance. The ring mounting bracket is good partner for mounting new speaker. You can install the speakers you want by adding extra depth. Material:Speaker mounting bracket ring made of good ABS material, will not oxidize moisture-proof, durable, wear-resistant, long service life, smooth surface, not easy to fade, no scratches.Specification: Material: ABS Fit for Speaker Dia: 6.5" Depth: 16.5mm / 0.65" Inner Diameter 1: 151mm / 5.94" Inner Diameter 2: 146mm / 5.75" External Diameter 1: 198mm / 7.8" External Diameter 2: 175mm / 6.89" Appropriate for: The speaker ring fits most 6.5 inch speakers. for Acura CL 01-03 Front Location for Acura MDX 01-14 Front and Rear Locations for Acura RSX 02-06 Rear Location for Acura TL 99-08 Front and Rear Locations for Ford Aspire 94-97 Front and Rear Locations for Ford Probe 89-97 Front Location for Honda Civic 01-05 Rear Location for Honda Odyssey 99-10 Front Location for Honda Pilot 06-08 Front and Rear Locations for Mazda Miata MX5 90-97 Front Location for Mazda MX3 92-98 Front and Rear Locations for Mazda RX-7 88-91 Front Location Installation Instructions:Speaker mounting bracket ring installed on the car audio system, utilizing existing vehicle mounting points without cutting or drilling.Item List:2 Pcs Subwoofer Speaker Spacer