1. Automatic Door Closer Fully adjustable pneumatic door closer for fire doors and general interior or exterior doors. Compatible with left and right handed wood or metal doors weighing 3080 kg and measuring 5090 cm in length. Delivers smooth self closing action for safety and quiet operation. 2. Soft Closing Device Adjustable closing speed and buffer control to prevent slamming. Provides controlled motion at any position within 100 degrees. Movable locating clip on the pipe body enables precise alignment and reliable performance. 3. Gas Spring Mechanism performance gas spring made of aluminum and iron for lasting resilience under frequent use. Delivers a consistent force to close doors securely while reducing wear on hinges and locks. 4. For Easy Installation Simple mounting design takes up minimal space and fits most standard door configurations. Suitable for residential homes, commercial buildings, outdoor gardens, and fences. No special tools required for setup or replacement. Use scenarios Residential interior doors: ensures smooth, quiet closing for households with children or pets, improving safety and energy efficiency. Office or commercial doors: reliable, quiet operation that reduces door slamming and minimizes hinge wear in traffic areas. Outdoor or garden applications: ideal for shed doors or gate openings, providing secure, controlled closure in exposed environments.