9-7/8 x 15-7/8 x 3/4 actual size (10 x 16 x 1 nominal size). This 10x16x1 air filter is an extended surface pleated filter, which outpaces standard air filters with medium efficiency, and are engineered for decreased pressure drop, and longer service life, which reduces HVAC equipment maintenance and energy expenses. This 10x16x1 air filter is classified to ASHRAE test standards 52.2, which ensures that the air filter will capture debris as good or better than original manufacturer 10x16x1 air filters. Pleated design. MERV graded to ASHRAE classifications. 328 cfm flow rate.