New 100% bolt-in 304 stainless steel design for 4x4 or 4x2 models. No more peeling powder or rust. Kit includes stainless hardware, brass DOT push to connect fittings and single DOT air fill line. Air springs are rated at 5,000 lbs and max 550 PSI. Provision for lift kits is designed in with additional purchase of adjustable spacer kit. Please contact us for your application.