Aluminum Automatic Positioning Concealed Hydraulic Buffer Door Closers 80KG Hardware Fittings Condition: Item Type: Door Closer Material: Aluminum Weight: Approx. 1700g / 60oz Door Closer Plate with Speed Regulating Hole: Approx. 277x218x32mm / 10.9x8.6x1.3in Small Hole Size: Approx. 20x20mm / 0.8x0.8in Door Closer Plate Size: Approx. 329x306x22mm / 13.0x12.0x0.9in Slide Bar Size: Approx. 460x29x19mm / 18.1x1.1x0.7in Suitable Door Weight: 80kg / 176.4lb Suitable Door: Approx. 600x1200mm / 23.6x47.2in Closing Speed: 5-10s Locking Strength: Adjustable Application: Fire Doors, Stainless Steel Doors, Wooden Doors, etc. Door Closer Shell Size: Approx. 230x58x32mm / 9.1x2.3x1.3in Door Closing Range: The first stage of speed regulation (90°-15°door closing speed) The first stage of speed regulation (15°-0° closing speed) Positioning/Non-Positioning Interchangeable: No positioning: No need to tighten the stop device, the door may not be positioned Positioning: Tighten the stop device at the door stop position, the door can be positioned