Udor CD-8.5/30-S Plunger Pump spray gun Both valves and o-rings are

Both valves and o-rings are recommended to be replaced every 3 months or 500 hours

Impeller:  Brass

and its manual dump lever helps prevent it from failing on the job

The pillars on the left and right side of the guide allow you to easily pull your hose to the left or right

0-6000 PSI Pressure Gauge (Bottom Mount)

Udor CD-8.5/30-S Plunger Pump spray gun Both valves and o-rings areSolid Ceramic Plungers Stainless Steel Check Valves Heavy Duty Brass Manifold with External and Internal Bracing High Strength Aluminum Alloy Connecting Rods Large Diameter Brass or Stainless Steel Valve Caps with Increased Thread Depth Reinforcing Ring on Inlet and Discharge Ports Deeper Back Cover for Increased Oil Capacity 35 oz. Capacity Vented Oil Bath Crank Case 3 4 BSP F Inlet. 3 8 BSP F Outlet: 5. 5 8. 5 GPM 3 4 BSP F Inlet. 1 2 BSP F Outlet: