Available with clips to attach them to keychains, tool belts, and more, these lights are made from aircraft-grade aluminum and given an anodized finish for excellent corrosion resistance. They also provide up to eight hours of run time with 100,000-hour LEDs. Uses four alkaline button cells (included). Streamlight donates $1 to The Breast Cancer Research Foundation for each pink version sold. 1 1/2" x 1/2". Blister pack.