Back of tank mount designed for the Meridian and Meridian Edge. Compatible with most large, quality built euro-brace tanks. Please ensure that the section of Euro-bracing you mount to is strong enough to handle the weight of your lights plus the mount under torsion. Light Number of Arms Required Meridian 11 1 Meridian 11 + 2 Edge Bars 1-2 Edge 12 (Up to 3) 1 Edge 12 (Up to 6) 2 Meridian 24 1-2 Meridian 24 + 2 Edge Bars 2 Edge 24 (Up to 3) 1-2 Edge 24 (Up to 6) 2 Meridian 35 2 Meridian 35 + 2 Edge Bars 2-3 Edge 35 (Up to 6) 2 Meridian 45 2-3 Meridian 45 + 2 Edge 45s 3 Edge 45 (Up to 4) 2 Edge 45 (Up to 6) 2-3 Meridian 63 3 Meridian 63 + 2 Edge 63 4 Edge 63 (Up to 3) 2-3 Edge 6 (Up to 6) 3