Replacement foil and cutter for BRAUN Series 3 shaver, model 21B (MPN 736879)

Replacement foil and cutter compatible with BRAUN Series 3 shavers, model 21B. This original spare part contains an outer foil and an inner cutter block engineered to restore cutting efficiency and maintain skin comfort. Designed for routine maintenance, the set refreshes a worn cutting head to improve shave quality and extend the usable life of the Series 3 shaver. Installation is straightforward and requires no special tools.

Advantages

The replacement foil and cutter restore the shaver's original cutting performance and help ensure an even, close shave with reduced skin irritation. Because the components are designed to match the geometry and tolerances of the Series 3 cutting system, they provide consistent contact with facial contours. Replacing worn parts reduces tugging and pulling, improves battery and motor efficiency under load, and helps maintain the manufacturer's intended shave quality over time.

Suitable for

• Routine maintenance of Braun Series 3 shavers with the 21B-type cutting head
• Restoring shave performance when the original foil shows wear, holes, or reduced cutting efficiency
• Reducing skin irritation and tugging for frequent wet or dry shavers
• Extending the service life of a Series 3 shaver without replacing the whole device

Key specifications

• Includes outer shaving foil and inner cutter block designed for Series 3 geometry
• Material: precision-stamped stainless steel foil and hardened cutter blades
• Compatibility: fits Series 3 shavers using the 21B style cutting head
• Purpose: restores cutting performance and skin comfort
• Installation: snap-on/screwless replacement designed for tool-free fitting

How to use

Turn off and unplug the shaver before performing any maintenance. Remove the old cutting head according to the shaver's user manual, then lift out the worn cutter block and foil. Position the new cutter block inside the head frame, align the foil over the block and press until it clicks into place. After fitting, switch on the shaver briefly to confirm smooth operation and check for unusual noise or vibration. Clean the new components regularly with the recommended brush or under running water if the shaver is waterproof, and allow parts to dry before reassembly.

Recommendations

Replace the foil and cutter as part of regular maintenance roughly every 12–18 months or sooner if cutting performance declines. For optimal results, use genuine spare parts matched to the Series 3 cutting system and follow the shaver manufacturer's cleaning and lubrication guidance.