... . fully automatic production 2. Professional service team heavy load 316 stainless steel compression springFeatures of 316 stainless steel ... , alloy spring steel, refractory steel, brass, bronze, etc Load type compressionFinish Zinc-plated, nickel-plated, chrome-plated, silver- ... work team.4. Provided competitive price and serious quality control.5. Passed ISO9001:2008, ISO14001 and ROHs certification.6 ...