Click to expand Tap to zoom Whelen M7 Chrome Flange Adapter from M7 to 700 Series by Whelen Engineering $29.90 | / SKU M7FC700 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Description Description Whelen M7 Chrome Flange that adapts M7 to 700 Series hole.