Lumocolor Whiteboard Marker Chisel Tip Set of 4 Whiteboard markers with locked chisel tip (approx. 2 or 5 mm) DRY SAFE: The markers can be left uncapped for days without drying up (test ISO 554 Airplane-safe: An automatic pressure equalization prevents the marker from leaking on board aircraft Can be dry-wiped from whiteboards and surfaces such as glass and porcelain without leaving a trace Fast-drying, low odour, Improved colour intensity with clip