Compatible with Model Series 5000 S5570 S5560 S5380 S5370 S5230 S5210 S5130 S5110 S5095 S5090 S5082 S5081 S5080 S5079 S5078 S5077 S5070 S5050 S5075 S5211 S5271 S5011 S5013 S5015 S5050 S5074 S5075 S5078 S5079 S5080 S5082 S5085 S5090 S5100 S5110 S5130 S5140 S5150 S5203 S5205 S5210 S5211 S5213 S5230 S5231, S5251 S5252 S5270 and so on. Easy to replace: These shaver replacement heads are easy to install, after installation, place a tiny drop of oil on each head and run for 10 seconds, helping to ensure it properly-running. Clean the razor before installing. Essential Accessories: The blade fixing ring is used to fix the shaver blade and ensure the normal operation of the razor. Made of high quality ABS material, it is sturdy to use. The package contains three retaining rings that perfectly replace the original one. Melakee Shaver Head Blades Holder Plate for Razor Head Series 5000, 3PCS SH50 Blue Razor Retaining Rings Lock-Ring Blue Blade Retaining Rings for Shaver Model SH50 Shaver Head Series 5000