COOLHILL Men's Shaver Replacement Blades 5000/7000 Series Replacement Blades SH71/51 Shaver Head Beard Trimmer Replacement 5000/7000 series SH71/51 Shaver Replacement Parts Set of 3 (Steel Precision Blades) Compatible with: Men's shaver replacement blades 5000/7000 series replacement blades Remarks: Made of stainless steel. The blades are very sharp. It is recommended to replace the blades every 12 months under normal conditions, but this is just a guideline. It is recommended to replace them within a certain period to maintain a comfortable shave. Compatible models: New S5000 series (S5887 S5882 S5586 S5588 S5582), New and old S7000 series (S7970 S7930 S7910 S7882 S7786 S7782 S7561 S7561 S7761 S7561 S7560 S7521 S7520 S7311 S7310) [Product Features] The replacement blade metal mesh cover has nano-sized micro-pores that capture hair from all directions and shave from the root. It achieves a perfect shave while reducing skin damage like never before.