Stainless Steel Tank/Angle Iron Chassis Made in USA Nitrogen - Popular because there are no moving parts, no noise and no vibration. One #80 Nitrogen cylinder, hold 2,200 psi, enough pressure to spray 100 gallons of paint before refilling. Refills at your local welding supply store is approx. $20. Sold without Nitrogen cylinder. Steel, exchangeable cylinders can be purchased locally at your welding supply store Rugged, light-weight and easy to operate Enclosed spray box ensures the sharpest possible line even on windy days Paint Line Striping Equipment Model 250N Trueline Striper/Without Nitrogen Cylinder Nitrogen - Popular because there are no moving parts, no noise and no vibration. One #80 Nitrogen cylinder, hold 2,200 psi, enough pressure to spray 100 gallons of paint before refilling. Refills at your local welding supply store is approx. $15. Nitrogen is a completely neutral gas. It will not dry paint or change the pH sensitive balance. It also makes up two thirds of the air we breathe and is non-flammable and very safe. Sprays any type of Traffic Paint