PVC Opstand 75x75 cm Curb type:Straight Upstand 16 00 16 cm high for skylight 750 x 750 Daylight opening = Roof opening Installing an openable Skylux iDome Installing an openable Skylux iDome with PVC curb 20 00 EP with blackout blind 1400 x 1400 mm is not an everyday chore Installing an openable Skylux iDome with PVC curb 20 00 EP with LED & insect screen 0800 x 1300 mm is not an everyday chore Match the design to your specific project: choose a sloped version to capture the maximum amount of daylight and distribute it evenly throughout the room you choose a flawless and completely watertight installation of your skylight or flat roof window