Synthetic O-ring and piston cup hold up against the harshest chemicals, even D-limonene. Up to 40% greater output per stroke significantly reduces the number of times you pull the trigger and a high output with an extra large spray pattern make quick work of any job. Outer body protects piston assembly from damage during use and storage.Harsh Chemicals, D-limonene, Automotive, Car Wash, Auto Detail, Carpet Spot Cleaning, General Use