Streamlight Tailcap Assembly for PolyStinger LED/DS LED Flashlights 76102 replaces the Tailcap Assembly on your Streamlight PolyStinger LED/DS LED Flashlights. If you need to install a new tailcap on a Streamlight PolyStinger LED or Polystinger DS LED Flashlight, this Streamlight Tailcap Assembly is the part you need.