Keep your small outboard safe and upright on the stern rail, rather than stowed in a locker where gasoline from the tank could cause hazardous fumes to collect, or spill and ruin stored goods. Two-piece mounting blocks clamp around a 1"OD rail T” and hold outboards up to 8hp. UV-stabilized polypropylene. 10 1/2" square.Recommended Usage: Storage for dinghy outboards Maximum Weight: 4-Strokes to 100lb. Style: Fixed Material: UV-stabilized polypropylene Attachment Method: Clamps onto 1" rail T Attachment Hardware: Stainless steel fasteners included Warranty: One year