Air and gas filters sold in Thunderbolt are used to clean out and remove oil, water and solids. Filter contaminants plug orifices of sensitive pneumatic instrumentation, wear out seals, erode system components, reduce air tool efficiency and even reduce the absorptive capacity of desiccant air/gas dehydrators for compressed air systems. Thus, filters are needed to correct for them. Customized filters can also be made depending on the client's specifications. Most companies that manufacture filters use an extensive distribution system to bring those products to the end user. Some of the filters manufactured include F.R.L.’s (Air Preparation Units), Mist Eliminators, Breathing Air Filters, Instrumentation & Gas Sampling Filters, ASME Coded Vessels, Stainless Steel Air Preparation Units, Air & Gas Microfiltration, Alternative Fuel Filters, High Pressure Compressed Gas Filters and many more such models. Many filters now manufactured are considered green, and some even come with environmental certification.