10R-216-3-05 is a type of air filter used in air conditioning systems. It is a medium efficiency filter, meaning it has a high dust holding capacity and captures particles ranging from 10 to 40 microns in size. It is rated MERV 9, is made of electrostatically charged synthetic media, and is 19-7/8” wide, 20-3/4” high, and 1-3/4” thick. This filter is ideal for residential and commercial applications, and is UL classified and tested in accordance with ASHRAE Standard 52.2.