[Compatibility]:Compatible with norelco hq8 replacement heads Shavers Models: AT750 AT751 AT890 AT891 PT710 PT715 PT720 PT725 PT730 PT735 PT860 PT870, HQ71XX series, HQ73XX series, HQ88XX series etc model. [New Upgrade]:HQ8 Compatible with philips norelco aquatec blades,is a double-precision cutting system using lifting and cutting technology, the sharp blades can cut through your beard quickly and you don't have to worry about the blades pulling your beard." [Comfortable Shaving]:360 degrees without dead ends remove your beard gently, painlessly and more clean, round head design perfectly protect your skin from scratching,for philips hq8 replacement blades,Can dry shaving and wet shaving. [tips]:After installation, place a tiny drop of baby oil on each hq8 Compatible with norelco aquatec replacement blades and allow shaver to run for 10 seconds. These steps will help to ensure your shaver properly and smoothly running. [Package Contents]:Product includes only 9 New Upgraded HQ8 blades and one brush, not the entire head,Replace hq8 for norelco aquatec replacement heads Every 3-6 Months for Best Shaving Performance. [Compatibility]:Compatible with norelco hq8 replacement heads Shavers Models: AT750 AT751 AT890 AT891 PT710 PT715 PT720 PT725 PT730 PT735 PT860 PT870, HQ71XX series, HQ73XX series, HQ88XX series etc model.