These louvers are used for providing ventilation at various positions of the building such as Toilets, Rooms, Elevation of factories & buildings.There are generally three designs of louvers which come in various sizes, Glass ,Oval & Z type.The Glass louvers are used in toilets which the movement can be adjusted for more light & air and Oval & Z type are used generally in elevation and also in toilets.It is generally fixed on to the frame but can be adjusted using sections for movements ,generally applied in toilets for ventilaton but static in elevation of buildings.Customized designs are possible.