New, Genuine USA Surefire Z68 Clicky Tail Cap. New take off, (may have thread lube) E-series, tail Standing, with textured clicky button. Fits E2D, E1B, E2E, some Vampires, Aviators, Scout and weaponlights, Backup, M800, and many other e- series lights. Soft press = momentary on. Click press = constant on. 

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