Speaker Spacer for Wet Sounds REVO 12 HP/FA S4 - 12" Series Subwoofer - .50" - WhiteDon&';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 - .50" Edge - 1/16" Round Outer Diameter - 12.68" or 322 mm Bolt Hole Circle Diameter - 12.26" or 311 mm Mounting Hole Diameter - 11.26" or 286 mm Compatible With 12" REVO 12 HP/FA S4:REVO 12 HP S4-B V2, REVO 12 FA S4-W V2, REVO 12 FA S2-B V2, REVO 12 FA S2-W and REVO 12 FA S4-B V2 *Sold as a PairThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Type: Mounting Brackets Box Dimensions: 2"H x 13"W x 13"L WT: 1.05 lbs UPC: 616050458151