Featuring weight capacities of 8K to 40K boatlifts. In addition to world class gear plates, Boatlift U.S. has developed a sealed, oil-bath gearbox™ specifically for boat lifts. This means that the gears never need lubrication allowing for a maintenance free drive system. This Gear Box™ Boatlift comes standard with stainless steel Electra Gear Boat Lift motors, Galvanized drive shaft, strong no-weld aluminum construction, and Aluminum bushings with grease fittings. The grooved cable winders protect the drive shaft and helps keep the cables winding without overlapping. The Boat Lift U.S Gear Box™ Boat Lift also comes standard with Aluminum Bunks. All Boat Lift U.S Boatlifts are Manufactured to the Highest Quality. When choosing the proper weight capacity of a Boat Lift always keep in mind the total weight of your Boat (Wet Weight). Choosing a Boat Lift with a higher weight rating than you might currently need is a smart decision so you are not maxing out your new Boat Lift right from the start. This will also help if you are thinking about going to a larger boat in the future.