Speaker Spacer for Wet Sounds REVO 8 - 8" Series Speakers - .25" - BlackDon't have enough depth to install your speaker/subwoofer? Problem solved these spacer rings give you that extra space needed to mount your speaker/subwoofer.Specifications:Thickness - .25"Edge - 1/16" RoundOuter Diameter - 8.9" or 226 mmBolt Hole Circle Diameter - 8.11" or 205 mmMounting Hole Diameter - 7.1" or 180 mmCompatible With 8" REVO 8:REVO 8 XS-W-SS, REVO 8 XS-B-SS, REVO 8 XS-G-SS, REVO 8 XW-W, REVO 8 SW-W, REVO 8 XW-B, REVO 8 XS-S and REVO 8 SW-B*Sold as a Pair