General description Our ingeniously designed leveling wheels facilitate the effortless transportation of substantial burdens, elegantly merging functionality with ease of use. Engineered with precision bearings and robust materials, these wheels ensure durability against heavy loads and seamless maneuverability across various terrains. Technical specifications Model: GD-80S Material: Nylon and Aluminum Alloy Color: Black and White Shape: Round Assembly Required: Yes Number of Pieces: 4 Load Capacity: 500kg/1102 lbs (Single Wheel) Gross Weight: 4.66kg/10.27lbs Net Weight: 4.43kg/9.77lbs Package Size: 27*19*11cm/10.63*7.48*4.33in Stretch Size: About 1.5cm/0.59in Each Wheel Diameter: 63mm/2.48in Mounting Height: 103+15mm/4.06+0.591in Base Plate Size: M12 Mounting Distance: 70*70mm/2.76*2.76in Installation Simple construction and complete accessories make it possible to assemble the wheels by yourself, which is very time-saving and convenient. Please measure the distance of the screw