Instruct: Classify Amazon reviews into positive or negative sentiment
Query: False Advertising

These are supposed to be 20x25x4 inch filters. They actually measure 19.5x24.5x3.5, don't fit where the 20x25x4 fits, leak air around the edges. Totally an unacceptable substitution for the real thing. The vendor should be ashamed of themselves. I tried one filter for 2 weeks and will NOT be purchasing these again. I'll be using the brand name Honeywell filters in the future.