TrustFire Xenon Bulb Lamp Replacement 180 Lumens 7.4V for SureFire 6P/G2 UltraFire WF-501A/501B/502B/L2/C1/C309 26.5mm Diameter Material: Aluminium; Reflector: orange peel reflector Bulb Type: Xenon; Mode: 1; Working voltage: 7.4V Light Color: Yellow; Weight: 16g Head diameter: 26.5mm; Whole length: 36mm Replacement for the lamp of 26.5mm head diameter, for example UltraFire WF-501A/501B/502B/L2/C1/C309 and SureFire 6P/G2