REPLACEMENT HEAD FOR SERIES 3 SHAVERS: Compatible with for series 3 shaver replacement head 300s, 310s, 3010BT and all Series 3 foil razors. SHAVING PERFORMANCE: 21B replacement head for shaver includes 3 independently floating shaving elements, these flexible shaving units are ergonomically designed to adapt to your for a great comfort and close shave. QUALITY CRAFTSMANSHIP: S3 replacement head is built with precise tooth comb technology and mesh design. The comb captures more hair in each stroke, the meshes prevent pulling hair, enable a comfortable and efficient shaving experience. MATERIAL: S3 wet and dry replacement head is made of top quality material with the ability of waterproof and rust-, you can enjoy both wet and dry shaving. It is recommend to replace 21B series 3 foil and cutter every 18 months. EASY TO REPLACE, EASY TO CLEN: Pull the old series 3 shaver head out, then click the 21B head on. Come with a cleaning brush, get a fast clean by rinsing the 21B series 3 replacement blade under a tap, or have a deep clean using the cleaning brush. Color: As Shown Material: plastic+metal Package Contents: 1 x Shaver Head 1 x clean brush 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.