Streamlight 72016 Key Mate Filter Combo Virtually unbreakable machined aircraft aluminum Lens: Unbreakable polycarbonate with scratch-resistant coating 100,000 hour lifetime high intensity LEDs with reflector options; LED available in white, blue, or green Up to 96 hours run time on four alkaline battery cells (either LR44, AG13, LR1154, or A76) 2-1/4-Inch long