Speaker Spacer for JL Audio M6/M3/MX Series 10 Subwoofer - .50 - 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 - .50Edge - 1/16 RoundOuter Diameter - 10.75 or 273 mmBolt Hole Circle Diameter - 9.71 or 247 mmMounting Hole Diameter - 9.1 or 231 mmCompatible With 10:M6-10IB-C-GwGw-4, M6-10IB-S-GmTi-4, M6-10IB-S-GwGw-4, M6-10IB-C-GwGw-i-4, M6-10IB-S-GmTi-i-4 andM6-10IB-S-GwGw-i-4M3-10IB-S-Gw-i-4, M3-10IB-S-Gm-i-4, M3-10IB-C-Gw-4, M3-10IB-S-Gw-4 and M3-10IB-S-Gm-4 MX-10IB3-CG-WH, MX-10IB3-SG-WH, MX-10IB3-SG-TB, MX-10IB3-SG-CR, MX-10IB3-CG-TB, MX-10IB3-SG-WLD-B, MX-10IB3-SG-TLD-B, and MX-10IB3-SG-CLD-B*Sold as a Pair