This pair items is made of high quality steel material, anti-rust and corrosion-resistant, durable and sturdy to use, not easy to bend. This thickness of them are 2.0mm and 4.0mm, they can load large capacity about 50kg. They also can be dissembled and easy to operate, according to your needs, they can be used to sit or rely on. Nice product at a good price, worth buying. Features: Made of heavy duty steel material, anti-rust and corrosion-resistant, durable and sturdy to use, not easy to bend and break. Large load capacity, can load about 50kg/100lb, so they are used as a large lift up coffee table mechanism hardware. With this kind of lift you can turn your normal coffee table into a functional coffee table, they also can be used to change the function of other table. Using them can help you save much space that make you home more clean and tidy, perfect for your project. Easy to assemble, very simple to use. Specification: Condition: 100% New Color: Black (Shown as picture) Material: Heavy Duty Steel Load Capacity: Approx. 50kg / 100lb Angle Range: Approx. 125 degree Thickness: Approx. 2.5mm and 4.0mm Folded Size (L x W): Approx. 340 x 102mm / 12.6 x 4inch Bottom Size (L X H): Approx. 172 x 45mm / 6.8 x 1.8inch Raise-up Height: Approx. 140mm / 9.5inch Top Forward Length: Approx. 228mm / 9.0inch (All sizes shown as picture) Package Weight: 1.44kg Package Included: 2 x Hydraulic Hinges Features High Quality Material------>Made of heavy duty steel material, anti-rust and corrosion-resistant, durable and sturdy to use, not easy to bend and break Large Load Capacity------>Can load about 50kg/100lb, so they are used as a large lift up coffee table mechanism hardware fitting furniture hinges with springs Function------>With this kind of lift you can turn your normal coffee table into a functional coffee table, they also can be used to change the function of other table Save Much Space------>Using them can help you save much space that make you home more clean and tidy, perfect for your project Easy to Assemble------->Easy to assemble, just attaching the springs on the hinges, very simple to use