DORMA BTS75v Floor Spring Door Closer EN 1-4 Floor spring and accessory pack, NOTE face plate not included Non-hold-open floor spring with spindle. For installation on internal and external doors up to 1100mm. Backcheck ideal for high traffic doors as it offers resistance when the door is opened with excessive force, preventing damage. Dual-handed for push or pull side mounting. Closing and latch speed adjustments for a perfect closing action. Minimum fire door width is 767mm. Size 1-4 Max. Door Weight: 120kg Max. Door Width: 1100mm Adjustable Sweep Speed: 170-15° & 15-0° For Use with Double-Action Doors Universal Application (Non-Handed) Min. Fire Door Width: 767mm