Brand new, unused item! [Compatible Product] Replacement shaver blade for Series 5, black, compatible with F/C 52B. This is not an authentic or genuine product. 2 [Material] ABS + stainless steel. The titanium-coated replacement blades provide a better shaving experience. 3 [Compatible Models] Series 5: 5020, 5020s, 5030, 5030s, 5040, 5040s, 5050, 5050cc, 5070, 5070cc, 5090, 5090cc, 5140s, 5145s, 5147s, 5190cc. 4 [Replacement Guide] We recommend replacing the blades every 18 months to maintain the shaver's performance. 5 [Other] This is a cassette type with the foil and cutter integrated. It is compatible with F/C52B and F/C52S, and can be used with all shavers that support these models. For ease of maintenance, the outer blade can be removed by pressing on both sides of the handle.