These filters are custom made for use in the filter track of Goodman, Amana, Franklin air handlers. Perfect fit for maximum air filtration for your ac. Actual size 20.5×22.5×1. Always use the properly sized filter for your ac system. Using the properly sized filter will save you money on your utility bill and maintenance cost. These filters use a heavy-duty beverage board frame that won’t collapse under the air pressure. Reinforced with a wire mesh backing on the upstream side of the filter media. These are custom made for us, please allow up to 5 business days to ship. They usually ship sooner. Case of 6.