SLOWLY OPEN DROP DOWN LID: soft closes hinge designed for opening the drop down doors from horizontal or vertical closed position, such as trap door, attic door and more drop leaf of cupboard, cabinet shoebox. Note: NOT support random stay PRESSURE: Weight support: 100N/22lb. Suitable for: 16-22lbs drop door. Overall length: 7.9in (compressed) to 11.4in (extended). Travel-3.5in. Support reversible mounting AUTOMATIC LOWERING: Sturdy gas spring for exclusively damper the lowering rate. space-saving gas struts will extend automatically as you pull the lid open, and will not get in the way HIGH DURABILITY: Solid brass iron, Chrome plated and precisely sealed cylinder enhance the durability and corrosion-resistance Quantity: 2 pieces Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual