Can be modified to fit custom tanks and/or be set to determine amount of reserve gas available with any custom gas tank. Stainless steel internal ball bearings provide virtually friction-free petcock handle motion. 90 movement between each detent ensures positive transition when riding. Manufactured from 360 brass and stainless steel ball-bearings and components. Features detents for quick, effortless switching from “On” to “Reserve” to “Off”. Valve position firmly held in place and unaffected by vibration. Made in the USA.