Suitable for 40B: CT2S, CT4S, CT2CC, CT4CC, CT5CC, CT6CC High-Quality Materials: Made of high-quality materials for continuous, efficient, and easy-to-use performance Optimal Shaving Performance: For best results, replace the shaving head every 18 months. Over time, performance may decline after trimming hundreds of thousands of hairs Advanced Processing Technology: Replacement head features advanced processing technology to enhance compatibility and performance Restore Shaver Performance: Replacing the head helps restore your shaver’s performance and provides a closer, more comfortable shave. Regular replacement keeps your shaver in optimal condition for years Color as shown Material: Plastic + Metal Package Contents: 2 x Shaving Heads Package includes only the items listed above; other accessories not included Note: Lighting and display settings may cause slight variations in color. Measurement may vary by +/- 1-3 cm