It is recommended that you replace your shaving head once every 12 months for maximum shaving performance. Compatible with HQ8 series shavers. Fits models: 71-Series, 72-Series, 73-Series, 77-Series, 7800, 88-Series, PT/AT7-Series, PT/AT8-Series, SH50/52, and others. This is a high-quality generic replacement head at a fraction of the cost of new original parts. Universal compatibility includes models: AT810, AT815, AT830, AT890, PT710, PT715, PT720, PT730, PT735X, 7737X, 7745X, 7775X, HQ7740, HQ7742, HQ7760, HQ7762, HQ7780, HQ7782, 110XL, 8831XL, 8845XL, 8846XL, 8865XL, 8887XL, 8880XL, 8881XL, 8883XL, 8890XL, 8891XL, 8892XL, 8894XL, 8895XL, 7800XL, 7812XL, 7350XL, 7345XL, 7340XL. Color: Silver Material: Metal Package Contents: 3 x Cutter head accessories Only 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 to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.