... 1. fully automatic production 2. Professional service team heavy load 316 stainless steel compression springFeatures of 316 stainless steel compression ... steel, alloy spring steel, refractory steel, brass, bronze, etc Load type compressionFinish Zinc-plated, nickel-plated, chrome-plated, silver-plated ... for example, 100kg goods only need 6usd/kg and 50kg goods only 7usd/kg. If you just place an order ...