The seals are activated by the closing action of the door, dropping down to seal only when the door is closed. This leaves the door threshold clear and flat, without the need for high fixed thresholds. Designed to form an effective barrier against the outside climate, noise, light, fire, smoke and insects. They provide a cost-effective solution for document part E and part M of the latest UK building regulations relating to disability access and energy conservation.Surface mounted for retro fitting on timber door setsScrew fix (screws supplied)Can be fitted to inside (lock side) using bumper provided or outside of the door (non lock side)Seal drops on hinge side before lock sideGalvanised steel flat springs and reinforced actuators4-Fin high quality 'V' zero class PVC rubber seal, self extinguishing14mm maximum dropAcoustic testing BS EN ISO 140-3: 1995 rating of up to 37dB RwFire tested to BS476: Part 20/22: 1987 to 60 minutesSmoke tested to BS EN 1634-3: 2004"Size mm: 930 x 40 x 13Size inch: N/AFinish: N/AFrame Colour: N/AMax Door Thickness mm: N/AFire Rating: 60 Minutes.