Click to expand Tap to zoom Whelen 700 to 73 Series Mounting Adapter by Whelen Engineering $6.50 | / SKU 73FKIT 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Description Description Whelen 700 Series to 73 Series Adapter Kit for mounting your newer 700 series light to older 73 series holes.