Automatic door closer, self-positioning hydraulic door buffer, door fittings for concealed hydraulic buffer force saving per door.

1. With a stop device, it can perform the mutual conversion between positioning and non-positioning. 2. The square-shaped hydraulic shaft and the positive and negative force of the speed control valve are designed for precision. 3. Adopts a sliding movable track, with a firm connection, smooth sliding, and convenient installation. 4. Made of high-hardness aluminum, strong and durable, with good durability and stability. 5. 2-step speed regulation: tighten the screw clockwise to decrease the closing speed, loosen the screw counterclockwise to increase the closing speed. Specification: Condition: Brand New Item Type: Door Closer Material: Aluminum Weight: Approx. 1700g / 60oz Door Closer Plate with Speed ​​Regulation 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 Sliding bar size: approx. 460x29x19mm / 18.1x1.1x0.7in Suitable door weight: 80kg / 176.4lb Suitable door size: approx. 600x1200mm / 23.6x47.2in Closing speed: 5-10s Locking force: Adjustable Application: fire doors, stainless steel doors, wooden doors, etc. Door closer shell size: approx. 230x58x32mm / 9.1x2.3x1.3in Door closing range: First speed regulation stage (door closing speed from 90° to 15°) First speed regulation stage (closing speed from 15° to 0°) Interchangeable with/without positioning: No positioning: No need to tighten the stop device, the door cannot be positioned. Positioning: Tighten the stop device to the door's stop position, the door can be positioned. Package list: 1 x Door closer housing 2 x Door closer plates 1 x Sliding bar 14 screws Note: 1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new and old types of this product will be sent randomly, and make sure you don't mind before ordering.