General description Our 20 Pieces Series Replacement Blades Head for Electronic Shavers offers a 360-degree shaving experience, ensuring a smooth shave without scratching the skin or missing unwanted hair. The round design effectively reaches difficult areas, providing efficient results. Technical specifications Compatible Models: SH30, SH50, SH52, HQ30, HQ50, HQ52, S1020, S1050, S1060, S500 Series (S510, S511, S512, S520, S530, S531, S538, S550, S551, S560, S561, S570, S571, S575), S5000 Series (S5050, S5070, S5075, S5077, S5078, S5079, S5080, S5081, S5082, S5090, S5091, S5095), and other series models Material: Steel Color: Silver Package Contents: 15 x Razor Blades, 5 x Cleaning Brushes Measurement allowed error: +/- 1-3 cm Installation Shaver heads are easy to install for replacement. After installation, apply a small drop of oil on each head and operate for 10 seconds to maintain optimal function. Usage It is recommended to replace the shaving heads every 12 months for optimal