Made with one natural Healing quartz crystal. Chamber made by only the finest polished metals, aluminum and brass. Equipped with LED and resistor. Also comes with LED blade emitter heatsink holder (1 inch). Ready for your sound module. You can choose your LED color. This particular chamber is equipped with a blue LED and ready to ship today! Fits: Korbanth Graflex 2.0 (with 1 inch blade holder) Vintage Graflex Any hilt with over 1 inch inside diameter. Each chamber is made to fit the natural quartz crystal, so each chamber is sized slightly unique.