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Machined aluminum case with non-slip rubberized comfort grip Lens: Unbreakable polycarbonate with scratch-resistant coating 3 watt super high flux LED, impervious to shock with a 20,000 hour lifetime Runtime: high beam up to 1-3/4-continuous hours, medium beam up to 3-1/2 continuous hours, low beam or strobe up to 6-3/4-continuous hours 8-1/2-inches