Home Long RX Approach Ramp Extension (Two Required) Long RX Approach Ramp Extension (Two Required) by Hunter Engineering Long RX Approach Ramp Extension (Two Required) Click to expand Tap to zoom $0.99 Call 800-294-1605 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Adds 17.75" to overall length of RX9 and RX10, or 5" to RX12A when substituted for 147-104-1-001. (Two Required). Black or blue color. Specify PPP=005 for black or PPP=007 for blue.