Home Wall Mount Extension Kit Wall Mount Extension Kit by Hunter Engineering Wall Mount Extension Kit 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 up to 25 1/2" to HS401WM and HS400WM configurations. HUNTER ENGINEERING - 20-2184-1