Automatic Hydraulic Door Closer with Stop Device Adjustable Spring & Buffer Close Keep Doors Open at 90-180 This innovative door closer allows you to maintain your door open at any angle between 90 and 180, eliminating the need for external force or door stoppers. Perfect for ensuring a well-ventilated space or facilitating frequent movement of goods, simply pull the door open past 90 and it will close automatically when you're done. High Quality & Adjustable Speed Crafted from premium aluminum alloy, this hydraulic door closer operates silently and efficiently, enhancing your daily life by removing the hassle of manually closing doors. With two independent valves, you can easily adjust both the closing and latching speeds to suit your preferences. Easy Installation & Quality Assurance Installation is a breeze with our comprehensive manual and instructional video. This hydraulic door closer meets CE, UL, and 3C certifications, ensuring it adheres to rigorous safety and quality standards. Manufactured in accordance with European production standards, you can trust its reliability. Versatile Applications Designed for doors weighing between 20-40 kg and widths of 750-850 mm, this size 2 door closer is suitable for both right and left-opening doors. It works seamlessly with wood, metal, residential, and commercial doors, making it ideal for various settings including homes, hotels, condominiums, apartments, warehouses, and fire doors.