Compatibility Models: HQ8 Replacement Heads Compatible with Philips Shavers AT810, AT830, AT850, AT880, PT720, PT730, PT860, HQ8505, 7340XL, 8894XL, Series 7100, 7200, 7300, 7700, 7800, 8800, Series PT/AT700, PT/AT800 etc. Upgraded Design: DualPrecision Cutting System, Lifts and Cuts for a Comfortable Close Shave, the HQ8 Blades first Lifts your Hairs then Cut below Skin Level for a Closer and Smoother Skin Contact for a Comfortable Shave. Comfortable Shaving: Round design for HQ8 replacement heads that allows the blade heads to slide smoothly on your skin, which provides you a comfortable close-shave experience in each shaving. Using Tips: Easy to take off and replace a new head- just 1 minute. After installation, put a drop of oil on each nozzle and run for 10 seconds to get the best experience. It's recommended that you replace the shaving head every 12 months to get the max shave performance. Packages & Services: 6 pcs of aquatec replacement heads and 2 pcs cleaning brush. If you have any questions about the HQ8 replacement heads, please feel free to mail us and we will be happy to provide further assistance. NOTE the shaver is not included. Gleway HQ8 Replacement Heads Compatible with Philips Electric Shavers, HQ8 Replacement Razor Blades Compatible with Norelco Aquatec HQ8 Series Shaving Head Upgraded for PT730 AT880 AT811, 6-Pack