Keep your electric shaver and hair trimmer in the best shape with genuine Philips Norelco Shaving Heads. Replace them when it's time and get your shaver back to 100% performance. There are 45 self-sharpening high-performance SteelPrecision blades for the best shaving performance. Use only genuine Philips Norelco Shaving Heads made in Europe ? as there are up to 90,000 cutting actions per minute*, the highest quality is a must. Check whether your device is compatible with the product. SH71 replacement heads are compatible with all Philips Norelco Shavers Series 7000 (S7xxx) and angular-shaped Series 5000 (S5xxx). They are not compatible with the rounded Series 5000, which use SH50 replacement heads instead. ¹For S5000 – 90,000 cutting actions per minute