N. Gandhi and Co. Offers Tungsten Balls with Flow Meters. N. Gandhi and Co. Is an ISO 9001 accredited company. The company manufactures high-precision steel balls, non-ferrous and non-metallic balls including ceramic, glass and plastic. The Tungsten Balls with Flow Meters are used for applications requiring extreme hardness and resistance to wear and abrasion, hard shocks and impacts. The Tungsten Balls with Flow Meters has applications that include special valves, flow meters, re-circulating ball bearing screws, linear bearings and balls for ball-point pens. They are also used often for minting, as pivots and points of comparators.