Pactrade Marine Boat Universal Swim Platform Under Mount Telescopic Ladder 1 Step Inboard Platform: 14" (length) x 18" (width), ladder: 11" (length) x 15" (width) Step thread: 7.25" x 1.5" thickness of tube: 7/8" Ladder can be stowed for storage purpose, white platform is made of fiberglass, telescopic capability Black step threads on steps for safety purpose, highstrength stainless steel 304 tubing at 7/8" Stainless steel hardware is available, weight capacity: 250 lb.