Manufactured to European Standards and CE marking to EN 1873 Manufactured from extruded white PVC-u Choice of 150mm splayed upstands in UV-stable white PVC-u Available in single, double, triple or quadruple skin polycarbonate, impact resistant glazing in spherical or pyramidal specifications Excellent waterproofing properties when fitted to manufacturers instructions High security fixings as standard Glazing available in clear, diffused, opal or cool & clear As well as the standard unvented/fixed option we can offer a trickle vent (pair), pole operated hinged wormgear or an electrical hinged linear motor which can be provided with the 150mm high kerb. These work on the principle of a hinged lifting frame rising away from the kerb on one side. This opening will maximise at approximately 30 degrees to the horizontal.The electrical linear motor will need to be wired to the power source by a qualified technician and will require an extra on/off switch to operate too.