Duepond manufactures balls from stainless steel 304 and 316 in various sizes up to 50 mm dia and are ground and lapped to mirror finish within the tolerance of ±0.025 mm. Because of their anti-corrosive and anti-magnetic properties, these balls are used in check valves, metering and hydraulic pumps, rotameters, flowmeters, laboratory equipments, perfumery and textile industries. Duepond also manufactures balls from stainless steel 410 and 420 in various sizes up to 50 mm dia. These balls are hardened to 45 to 55 rc and are ground and lapped to mirror finish within the tolerance of ±0.025 mm. They find applications in submersible pumps, mud pumps, offshore drilling equipments, etc. Enquiries for brass, bronze, aluminium, copper, glass, ceramic and tungsten carbide balls will also be entertained.