Package Contents: 1 pair 6.5 inch front door speaker spacer ring. **NOTE** Please allow 1-2mm error due to manual measurement. Straightforward installation. There's no special installation tools are required when install 6.5 inch front door speaker spacer rings. Using the existing vehicle mounting points. Required no cutting and drilling. Professional material designed. RED WOLF speaker adapter bracket is adopted ABS plastic with durable construction solid and well made. Will not rot like MDF or wood speaker mounts. Compatibility: 6-1/2 inches front door speaker adapter kit replacement for Subaru 2008-2018 Forester, 2014-2020 Impreza, 2003-2020 Outback, 2008-2019 WRX/STI, 2011-2017 Crosstrek, 2003-2014 Legacy, 2016 Levorg. OEM reference: Front Door Speaker 86301FG002. Please make sure this part fits your vehicle before ordering. Feature: The installation depth of the front door speaker spacer rings are 32 mm, which compatible with the 6.5inch (165 mm) allows you to replace factory speakers with aftermarket speakers. Can effectively stop the resonance of the speaker installation position, so that the speaker's mid-range frequency is more clear, low-frequency dive lower.