SH50 Replacement Heads for Series 5000 Shavers,Compatible With Series 5000 (S5xxx),PT8xx.Fits models: S5390 S5400 S5420 S5008 S5010 S5011 S5013 S5015 S5040 S5042 S5050 S5070 S5075 S5076 etc.Shaver Compatible with for S5100 S5110 S5115 S5130 S5140 S5170 S5205 S5210 S5211 S5212 S5230 S5251.For maximum shaving performance, it is recommended to replace your shaving blades once every 12 months.After installation, put a tiny drop of baby oil on each , let the shaver run for 10 seconds. Replace your shaver heads every 12 months to reset your shaver to a new for best shaving performance.Colour:BlackMaterial:Plastic+MetalPackage Contents:2 * Replacement HeadsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.