Ideal for moving a small vessel such as a Jet Ski, Jon Boat, Small Sailboat, Dingy, or Inflatable around on any hard surface. Great for moving a vessel into a storage space or as a vessel display platform in a showroom. 1-1/2" square galvanized steel tubingRugged 4" castersTopped with 4' long carpeted bunks that adjust to gently support the vesselBunk spacing can be set at 12", 16" or 20"1,000 lb capacity