Sea Stair Provides safe, convenient boarding. This ladder adjusts automatically to the tide change and shifting of the yacht. Pins easily in place with push-pin mounts. Large casters glide smoothly and quietly over dock surfaces. Available with nonskid steps or with teak steps and handrail or new marine deck. Six Step Models Measures 63 " x 21" x 2 " when stowed. For vessels with freeboard up to 5'11" This item is oversize and does not qualify for free freight.