Oil-less Design. High Performance PTFE Piston Ring. Stainless Steel Valves. Moisture & Dust Resistant. Gearless Direct Drive Motor. Anodized Aluminum Alloy Cylinder. Automatic Reset Thermal Overload Protector. Mounting Brackets with Vibration Isolators. Stainless Steel Braided Leader Hose. Inline Check Valve. Remote Mountable Intake Filter Assembly. Parts Included: (2) 450C Silver Compressors. (2) Air Filter assemblies. (2) Remote Mount Brackets. (2) Sets of Remote Mount Fittings. (2) Sets of Spare Air Filter Elements. (2) Leader Hose Clips. (6) Air Line Clips with Included Hardware. (8) Sets of Nuts Bolts Washers and Lock Washers. (2) Heavy Duty 40-Amp Relays. (1) One Heavy Duty Pressure Switch (110 PSI on 145 PSI off). Air Line (For Remote Mount Filter Installation)