1. The 53B electric shaver blades are crafted from high - grade stainless steel. This top - notch material not only offers excellent corrosion resistance, ensuring a long - lasting performance, but also provides remarkable hardness. The stainless - steel construction allows the blades to maintain their sharp edge over time, delivering consistent and efficient shaves without the worry of rust or degradation. 2. Engineered with precision, these blades are incredibly sharp. Their sharp edges are designed to cut hair cleanly and closely, right at the skin's surface. This results in a smooth and close shave, reducing the likelihood of stubble and ingrown hairs. Whether you have thick or coarse facial hair, the 53B blades can handle the task with ease, giving you a fresh - faced look every time. 3. Designed to conform to the natural curves of your face, the 53B blades provide an optimal blade - to - skin contact. This close contouring ensures that every area of your face, including the tricky spots around the jawline, cheeks, and neck, is effectively shaved. The blades move smoothly along the skin, minimizing irritation and providing a comfortable shaving experience. 4. Thanks to their robust construction and high - quality materials, the 53B electric shaver blades are highly durable. They can withstand the rigors of daily use without losing their cutting performance. You won't need to replace these blades frequently, saving you both time and money in the long run. Their durability makes them a reliable choice for your shaving routine. 5.100% Performance: the replacement head allows your razor to return to 100% performance and a closer shave.Compatible models: for 50-R1000s/50-B1300s/50-R1320s/50-R1300s/50-M4000cs/50-M4200cs/50-M7200cc/50-W4320cs/50-B7000cccolor: blackMaterial: plastic + metalPackage contents:1 x Shaving HeadOnly the above package content, other products are not included.The color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3 cm.