AC:
An air conditioner is a major or home appliance, system, or mechanism designed to change the air temperature and humidity within an area used for cooling and sometimes heating depending on the air properties at a given time. The cooling is typically done using a simple refrigeration cycle, but sometimes evaporation is used, commonly for comfort cooling in buildings and motor vehicles. In construction, a complete system of heating, ventilation and air conditioning is referred.

Screws:
All size of Screws available here.