4520 Aluminium windows and doors (28) 4521 Aluminium windows and doors (106) Aluminium windows, doors and frames, installed in external faces of buildings 4522 Aluminium screens and shutters (74) Aluminium screens and associated frames for decorative purposes or security and light control; screens with infill of louvres, mesh, bars, etc., to prevent the ingress of people, rain and objects 4524 Aluminium roof and ceiling windows and lights (10) Aluminium lights fixed into roofing and ceilings 4528 Miscellaneous aluminium windows, doors and roof lights (0) Miscellaneous aluminium, windows, doors, roof lights and related items