acturerchina.com, consistent and accurate operation●?Offers a total cost approach_________________________________________________________________________ 2.Product Specification of the heavy duty compression springs Item heavy duty compression springsWire Diameter wire sizes ranging from .008" up to .312"Type CylinderOEM OfferedMaterial 302 stainless steelFinish PlainWire Type roundTolerance? 0.01-0.1mmApplication Hardwareplac of Origin ChinaSample time 2-4daysMeets / Exceeds SGS , ROHS , IS