The visible parts of the A/C system ducting are the air supply grilles covering the outlets which are usually wall-mounted near the ceiling and control the air distribution from the system (temperature range 0º up to 65ºC / 30 up to 140 ºF ). The air supply grilles A.B.S engineering Plastic consist of a row of adjustable louver blades in the front and a row of parallel blades in the back. In the front individual louvers are adjusted in each segment with a handle on the centre blade to adjust the air discharge angle in sideway direction. The back damper blades segment adjust the air discharge angle to up and down directions. Extruded aluminum painted Double Deflection. the blades are vertical and horizontal profile. mounted on the wall. Standard color is glossy off-white; Other colors can be supplied for large quantities.