Cam action for low opening moment Power adjustable Size 2 to 4 Fits timber doors from 45mm thickness Fits metal profiles with 36 x 45mm inner chamber Max opening angle 120˚ Overpressure relief valve Adjustable hold-open from 70˚ to 95˚ Non-handed Two speed valves: - One to control closing speed from 120˚ to 0˚ - Second to activate final latch from 15˚ to