FAKRO light tunnels enable illumination of all rooms in the building, even those which cannot be fitted with roof windows or vertical windows. It comes with rigid light transmitting tube which is made of aluminium, covered with a reflective silver-based layer reflecting light in 98% (the interior of the tube looks like a mirror). Allowing much more natural light inside the room. This FAKRO light tunnel consists of light collecting element, flashing, rigid light transmitting tube, elbow, diffuser and ceiling frame. FAKRO SRH Light Tunnel Features Reflective layer (using pure silver) applied in the production of elements of the light transmitting tube is characterized by one of the highest light reflective factors of over 98% It can be used in any room, but due to minimum light loss is recommended for special buildings in which natural light is transmitted over long distances (e.g. 12m) Consists of an aluminium frame into which 4mm thick toughened glass is bonded. The light transmitting tube is fitted to the inside profile of the frame. The roofing element is made of special organic glass Illuminates natural light the space directly below the installation of light tunnel’s outer element e.g. attic or loft The entire structure is finished in grey-brown RAL 7022 which matches perfectly all standard colours of roof covering materials The advised maximum light transmitting tube length is 1200cm (for the lengths over 400cm hangers must be applied) Suitable for pitches from 15 - 60deg and flat roofs Technical Tunnel diameter: 55cmTube length: 210cmFlashing Type: High profile roof cover Please note, this isn't this sun tunnel does not come with the elbow but does come with the flashing. The SRK is a requirement if the tunnel requires a bend.