We use all aluminum boxing from Ozroll (no cheap color bond boxes) all aluminum axles and sealed roller bearing. Our German Tracks and bottom bars are extruded here in Melbourne by Extrusions Australia, not made in China like most other company's. Its a known fact that Roller Shutters will reduce the heat entering that window by up to 90%. They will stop your curtains and drapes from becoming radiators and stop your floors and furniture from fading. In winter, reduce your heat lost by up to 15-20%. Call for a free no pressure quote. The owner Cliff Dobrowolski has been in the shutter industry for the last 13 years and customer service is his number priority. We now have a 12volt system, so if a power outage happens, you can still open your roller shutters. And now suppling FAAC motors from Italy, number 2 ranged tubular in the world.