Body Material: Rugged cast aluminum alloy body paired with heavy-duty steel arms.Adjustability: Features dual autonomous regulating valves to adjust both the sweeping/closing speed and the final latch-closing force.Size Configurations: The model line covers Small, Medium, and Big variants to accommodate varying door dimensions and weights (the medium size generally handles up to 60 kg doors).Safety Features: Includes an integrated cushioning function to slow or hold the arm, protecting the structural integrity of both the door and the wall frame.