Features: This Launching Wheel Is Designed to Enable One Man Launching of Inflatable Boat . Constructed of Heavy-duty Marine Grade Anodized Aluminum. Wheels Swivel up and down with Stainless Steel Marine Quick Release Pins When Needed . the Large Pneumatic 10'' X 3 '' Tires Are Good for Grass , Hard or Soft Sand, and Dirt. Recommended Max. Weight: 136 Kgs. Solid Tires Size: 10'' X 3 '' Stainless Steel Bracket Width : 35 Mm Shipping Weight: 5 Kgs Material: Stainless Steel Caution: the Launching Wheels Is Not Designed to Be Towed Behind a Vehicle. Only Suitable for Short Distance Beach Moves， Not for Highway Max Load：150kg.