Panasonic Shaver Replacement Inner Blade and Outer Foil Combo (WES9025PC) keeps your Panasonic ARC 4 shaver performing at its best, for a smooth, comfortable shave. Over time, shaver blades can become dull and pitted, and foils will wear too thin, creating skin discomfort and a less than satisfying shave experience. To help maintain the level of comfort and satisfaction you demand from your Panasonic shaver, the high-performance blades and foils should be replaced when dulled, once every one to two years. Installation is easy, as parts are designed to custom fit your shaver model. Simply remove the worn blade and foils and snap the new ones into place. Genuine Panasonic ultra-sharp inner blade and ultra-thin outer foils are made from premium, Japanese stainless steel. Each blade reflects the centuries-old traditions of skill and expertise in crafting the high-quality steels once used to create Japans legendary swords. Genuine Panasonic blades are hypoallergenic, and precision-honed to a 30° angle for a consistently clean, close and efficient shave while the outer foils uses distinct cutting technologies that work in tandem to provide a close, comfortable shave experience. This replacement blade and foil is compatible with ARC4 shavers ES-LA63AA, ES-LA63-S.