This VEVOR 4 Bike Storage Rack is a free-standing, gravity-wall vertical bike rack designed for efficient and adjustable bike storage. It's made of sturdy steel and is easy to assemble, making it ideal for garages, living rooms, or sheds. The rack can hold up to 260 lbs (117.9 kg) and fits a variety of bike models. Its compact and space-saving design, along with no-drill wall installation, makes it a versatile solution for organizing your bicycles. The rack is sturdy and tip-proof. Adjustable height ranges for the left lower arm are 14.41" - 35.83" (366 mm - 910 mm), and for the left upper arm are 47.13" - 77.09" (1197 mm - 1958 mm). The max cantilever load is 65 lbs (29.48 kg), and the max single-side load is 130 lbs (58.97 kg). The right upper arm is adjustable from 44.76" - 74.72" (1137 mm - 1898 mm), and the right lower arm is adjustable from 12.05" - 33.46" (306 mm - 850 mm). The item model number is RC-1837B+C. It can hold 4 vehicles with a max overall load of 260 lbs (117.93 kg). The net weight is 26.12 lbs (11.85 kg), and the main material is carbon steel.