Borofloat glass lens, O-ring sealed Tail cap push button provides one handed momentary or constant on C4 LED technology, impervious to shock with a 50,000 hour lifetime The all-purpose PolyTac is designed for the broadest range of lighting applications at the best value. It features a superior grip texture for a comfortable but slip-resistant feel, as well as TEN-TAP Programming that gives users the choice of three operating modes.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }