The JL Audio ETXv3 Enclosed Speaker System Fixture â 3.000" (M-MCPv3-3.000) provides a secure and durable mounting solution for JL Audio ETXv2 and ETXv3 enclosed speakers. Designed specifically for 3.000-inch diameter pipes, it's ideal for marine and outdoor installations where stability and long-term performance are essential.• Compatible with JL Audio ETXv2 and ETXv3 enclosed speaker models• Fits 3.000" diameter pipe• Built for rugged, weather-resistant performance | JL Audio ETXv3 Enclosed Speaker System Fixture f/ Pipe Mounting 3.000