The universal marker that doesn’t dry out. Refillable universal marker for overhead projection and almost all surfaces. Dry Safe: can be left open for days without drying out. Airplane-safe automatic pressure equalization prevents the marker from leaking on airplanes. Excellent smudge and water resistance on almost all surfaces. Dries in seconds. Low-odor, xylene- and toluene-free ink with maximum color brilliance. The barrel and cap made of PP ensure a long lifespan.