Home Store Accessories/Upgrades UltraLite-mk5 Half-Rack Coupler Kit UltraLite-mk5 Half-Rack Coupler Kit Made of heavy-gauge steel, the UltraLite-mk5 Half-Rack Coupler Kit securely mounts two UltraLite-mk5 units joined side by side in a standard 19-inch equipment rack. Includes a coupler bracket with screws and two rack mounting brackets. $29.95 Add to cart