The cartridge is constructed out of a high quality molded polymer core

Fast Flight reinforced loops

Bubble and bubble housing are within the circumference of the housing

Extra-low dispersion glass: YES

E-TAC ELS4 Sight Light rinehart_cut_4_ship The cartridge is constructed outThe E Tac light turns on if it senses motion, and it automatically turns off if left stationary for a customizable set length of time to conserve its rechargeable battery Super wide brightness range. 15 Levels with memory 600mAh rechargeable Li ion battery. Battery life: approx. 1000 hours (level 1), 30 Hours (Level 15) 4 Mounting solutions to fit almost every bow The E Tac Light can be solidly mounted on the sight or riser with the included CNC