I wish I had seen another customer's review before wasting my time buying this replacement filter. The product description says it fits Bissell Zing 2156A but it doesn't. As another reviewer noted, the fitting at the top of the filter is slightly taller/larger than the original filter and therefore this replacement filter will not fit in the required canister slots. Very annoying! I urgently need a new filter! UPDATE: I have found that this replacement filter only fits in the 2156A canister by removing the removable screen that comes with the filter. The filter assembly should not function in this manner as the mesh acts as an additional filter for larger particles, extending filter life and capturing particles. These parts must work together and NOT separate when you use the vacuum cleaner!