... 1. fully automatic production 2. Professional service team heavy load 316 stainless steel compression springFeatures of 316 stainless steel ... steel, alloy spring steel, refractory steel, brass, bronze, etc Load type compressionFinish Zinc-plated, nickel-plated, chrome-plated, silver-plated ... if there is a need for sample making after your approval. 3. Production time of samples: 3 days for simple ...