Company Profile
Founded in 1963, Specializes in making high-precision, quality, stable piston rings backed by innovative facilities from Japan and Europe, also being ISO 9001:2008 certified. And in 2017 Advanced Edition being ISO9001:2015 certified.
As internationally recognized supplier, we design, manufacture and sell high-quality piston rings in cast iron, nodular cast iron, chromium-molybdenum alloy steels, and high-carbon steels, including
standard compression rings, chrome-plate rings, oil rings, step out rings, hooker rings, and nitrided rings fully meeting customers' requirements.
Our products are widely used in internal combustion engines for cars, motorcycle, ships, model planes, generators, mowers, chainsaws, mist generators, gas nailers, and agricultural machines; hydraulic transmissions, forklifts, conveyors, excavators, and spindles and cylinders for dump trucks; electric air compressors, chillers, and air conditioners.
We are recognized for optimal quality, S.P.R.-branded piston rings, being an OEM, also interested in marketing partnership, offering competitive prices, full-scale service, due to operation’s strategy’s demand in 2020, transfer to “TRADE” type’s commercial mode.
While expanding markets globally, we strive to better serve buyers with more quality-enhanced products.





