DVC Mirco-Lined products are crafted from high quality materials to ensure production of products that not only meet but exceed industry standards and customer expectations! DVC Products conducts extensive research and development unique to the industry supporting a steady stream of engineering development and patents. Easy to replace and install. Simply follow your vacuum's manual for easy removal and replacement of your foam and felt filters. Upon removal please properly dispose of the used foam and felt filters. You will be amazed at how quickly dirt and grime clog up your filters! Breathe clean and experience the renewed freshness of a brand new filter. Filters should always be replaced at least every 6 months. However, replacing the filters every 3 to 4 months is recommended. Manufacturers' Warranty: DVC Micro-Lined Brand products are fully guaranteed against defects in construction and materials. Should a product fail under normal home usage, we will send you a replacement at no charge. Please contact us to arrange having a replacement item shipped out to you. We may request you return the defective item to us for evaluation and testing. All Shark brand names and logos are the registered trademarks of their respective owners. Use of any Shark brand names, part, or model numbers are for the sole purpose of demonstrating compatibility. This product has been created and manufactured as a DVC Micro-Lined brand product and is not an OEM part.