COMPLETE REPLACEMENT - Our carbon pre-filters greatly reduce the amount of dust & particles getting into your main filter. Replacing your main HEPA filter is costly so with 12 pre-filters, you can save both time & money.NO MORE MEASURING AND CUTTING - Measuring and cutting filters is time-consuming and potentially inaccurate. Now you can replace your dirty old filter in a matter of minutes These are specially cut and designed to fit HPA200, 202, 204, 250B Purifiers.REMOVE ODOR, SMELL, AND SMOKE - Made from Premium Quality Activated Carbon to help keep your home smelling and odor-free. Perfect for households with pets, cooking, smokers & people suffering from asthma or allergies.colour: blackMaterial: activated carbonSize: 360x290x5mmPackage Contents:12 x HPA200 Filter cottonOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.