A. Material: The shaver blade is made of durable material that allows for both wet and dry shaving, and it is washable. B. Fine Protective Net: The rounded edges of the protective net fit 360 degrees to your face, and the precision slots can easily catch whiskers and hairs. One can enjoy a safe and smooth shaving without scratching. C. Sharp Blades: This upgraded blades replacement head can increase shaving efficiency and save time. Sharp blades also help avoid pulling whiskers and hairs. D. Easy to Install: One can replace the shaving heads in a few minutes. After installation, place a tiny drop of baby oil on each head and let the shaver run for 10 seconds to ensure it runs properly and smoothly. It is recommended to replace the shaving heads every 12 months for better shaving performance. E. Compatible With the Following Models: PT724/41, PT729/41, S738/17, S738/82, S1150/81, S1160/81, S1570, S1560/81, S3310/81, S3310/86, S3560/81, S3560/86. F. Colour: silver G. Material: plastic + metal H. Package Contents: 6 x shaver blade. Only the above package content is included, and other products are not part of it. I. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement error is allowed to be +/- 1 - 3 cm.