Ensure bright and reliable signal performance for your vehicle with this set of wedge-base glass micro bulbs "T20" (12V 21W). These W21W-type all-glass bulbs are specially designed for use in daytime running lights (DRL), reverse lights, brake lights, or turn signals across all 12V automotive systems. Delivering a strong and uniform light beam, they feature high vibration resistance and exceptional durability. Fully road-legal and safety-compliant, these bulbs feature official E-Mark certification and CE approval, guaranteeing compliance with strict European automotive standards.