Grohe 28mm Ceramic Cartridge
Genuine Grohe 28 mm ceramic cartridge designed for Grohe single-lever mixers. It features GROHE SilkMove technology for smooth handling and includes an integrated temperature limiter to prevent scalding. 
Key Specifications
According to data from Shower Doctor and Showerspares.com:
Type: Ceramic sealing system for single-lever sink mixers.
Diameter: 28 mm.
Features: Integrated temperature limiter; SilkMove technology for precise water control.
Material: Brass and ceramic construction.
 
Compatibility
This cartridge (46963000) is a universal spare part that fits a wide range of Grohe kitchen and bathroom taps, including: 
Kitchen Series: Grohe Essence, Concetto, BauCurve, BauEdge, BauFlow, and BauLoop.
Specialty Taps: Grohe Blue Pure Filter Taps (Minta, BauCurve, and Start models).
Basin Mixers: Grohe Allure Brilliant and Atrio (M-Size and L-Size).