Suitable for 40B: CT2S, CT4S, CT2CC, CT4CC, CT5CC, CT6CC. High-quality materials: Made from selected high-quality materials for continuous, efficient, and easy-to-use performance. Best shaving effect: For optimal shaving results, we recommend replacing the shaving head every 18 months. Within 18 months, your electric shaver can trim over 6 million hairs, after which cutting performance may gradually decrease. Special processing technology: The replacement head features advanced processing technology that enhances the overall texture and performance of your shaver. Restore performance: Replacing the head helps restore your shavers original performance for a closer, more comfortable shave. Regular replacement ensures long-term peak performance. Color as shown. Material: Plastic + Metal. Package contents: 2 x Shaving accessories. Note: Light and display settings may cause slight color variations between the image and actual item. Measurement error allowed is +/- 1-3 cm.