Streamlight Stinger DS LED Tail Cap Switch for Stinger LED Flashlights. This Tail Cap Switch allows for one-handed or constant operation of your Stinger DS Flashlight. The Streamlight Stinger DS TailCap Switch 75851 is compatible with Streamlight Stinger Dual Switch LED Flashlights with serial #034389 and later. Package Contents: Streamlight Stinger DS LED Tail Cap Switch for Stinger LED Flashlights Streamlight Stinger DS LED Tail Cap Switch for Stinger LED Flashlights 75851