25x25x2 MERV 11 Pleated Air Filter 6PK - 24.75x24.75x1.75 - Actual Size Sediment Water Filters 18x30x1 MERV 13 filters are

18x30x1 MERV 13 filters are pleated

depending on your water's pH level and hardness

16x30x1 MERV 11 filters are right on the cusp of being classified as “medium efficiency MERV pleated air filters” and “high-efficiency MERV pleated air filters

The PCF Series cartridges have been developed in response to the requirements for deionized water in many industries

Cartridge Style: Twist-Off

25x25x2 MERV 11 Pleated Air Filter 6PK - 24.75x24.75x1.75 - Actual Size Sediment Water Filters 18x30x1 MERV 13 filters are25x25x2 MERV 11 Air Filter Box of 6 Actual Size of Filter: 24 1 2 x 24 1 2 x 1 Air filters are ranked in a minimum efficiency rating value (MERV) system. The higher the MERV rating, the better the filter can filter out all airborne particulates. Since we are constantly trying to improve indoor air quality, it only makes sense that we would offer air conditioner filter MERV 11. 25x25x2 MERV 11 filters are right on the cusp of being classified as medium