The marine wahrf ladder is always made of aluminum alloy, sometimes it also can be made of steel. The ladder steps are designed as anti-skid type, which is safer used on the sea. Standard: imo, solas, gb, jis, etc. Type: fixed type, detachable type Material: aluminum alloy, steel Length: 3m to 30m Width: 0.6m to 2m Handrail height: 1m to 3m Packaging: wooden case, iron frame