Automatic Hydraulic Buffer Door Closer Adjustable Speed Mute Soft Closing Door Hardware easy to install fits home office doors

【3 Sizes for Precise Matching】Each size is tailored to specific door weights and frame widths, ensuring stable performance:Small Size: For doors 25-45KG and frames 500-1000mm. Perfect for lightweight interior doors, like bedroom or small office doors, where gentle closing is needed.Medium Size: Fits doors 45-65KG and frames 600-1200mm. The most versatile option—works with standard home entrance doors, office main doors, or glass doors with frames.Large Size: Handles heavy doors 65-85KG and frames 900-1300mm. Designed for commercial use, such as exterior store doors, fire doors, or large office entrance doors.【Durable Build for Long-Term Use】Made of commercial-grade aluminum alloy, it’s antioxidative, anticorrosive, and rustless—suitable for both indoor and outdoor doors. It withstands 400,000 test cycles (up to 500,000 cycles potential), so it won’t wear out easily even with frequent use. The 2 internal springs add stability, ensuring consistent closing force.【Automatic Hydraulic Closing & Speed Adjustment】Auto-Closing: Hydraulic operation closes the door automatically, preventing slamming and protecting the door and lock from damage. No more forgetting to shut the door manually.Adjustable Speed: Use the built-in screws to tweak closing speed. Follow the suggestion: set faster speed from 180° to 15° for efficient shut, and slower speed from 15° to 0° to avoid door impact—customize to your space’s needs.Quiet Operation: Smooth hydraulic movement ensures no loud noises, making it suitable for quiet areas like bedrooms, libraries, or offices.【Wide Compatibility】Works with almost all medium door types, regardless of material or opening direction:Opening Direction: Both right-opened and left-opened doors.Door Materials: Wooden doors, metal doors, fire doors, and glass doors with frames.Scenarios: Home (interior/exterior), office, and commercial spaces—one closer fits multiple uses.【Product Specifications】Material: Commercial-grade aluminum alloyColor: SilverType: 2 internal springs, 180° maximum opening (no hold-open function)Service Life: 400,000 test cyclesSize Details:Small: 25-45KG door weight, 500-1000mm door frameMedium: 45-65KG door weight, 600-1200mm door frameLarge: 65-85KG door weight, 900-1300mm door frame【Purchase & Usage Tips】Check Door Specs First: Ensure your door’s weight and frame width match the selected size—don’t use for doors lighter than the minimum weight of each size.No Hold-Open: This model can’t keep the door open; if you need that function, choose a different version.Speed Setup: Adjust speed after installation to balance efficiency and door protection—avoid too-fast latching to prevent damage.