Fakro DRF-DU6 Insulated Flat Access Roof Light Without Dome - 900mm x 1200mm This Fakro DRF rooflight has a DU6 glazing unit featuring excellent insulation parameters. Description In addition to illumination function, the DRF-DU6 has an extra utility feature providing safe and convenient access to the flat roof. Special hinges and functional opening system used in the access roof light ensure easy sash opening up to 80. Gas springs facilitate operation of the sash and keep it stable in the open position, thus protecting against accidental closing. The DRF-DU6 access roof lights also feature increased safety of use thanks to the application of anti-slip covers on their profiles. Warranty: 10 years for windows.