9.5x9.5x.75 actual size (10 x 10 x 1 nominal size). This 10x10x1 air filter is an extended surface pleated filter, which exceeds standard air filters with medium efficiency, and are engineered for lower pressure drop, and increased service life, which reduces HVAC equipment maintenance and energy expenses. Our 10x10x1 air filter is rated to ASHRAE test standards 52.2, which establishes that the air filter will capture debris as good or better than original manufacturer 10x10x1 air filters. Pleated design. MERV classified to ASHRAE ratings. 205 cfm flow rate.