The Pentel MW85 Whiteboard Marker is suitable to work on almost any whiteboard, perfect for everyday use. It features a vibrant pigment-based ink that shows clearly and doesn't run. • The nib size is 1.9 mm with a bullet tip. • Ideal for everyday whiteboard marker use. • The pen contains vibrant pigment-based ink. • The anti-roll cap has a unique shape. • This marker contains black ink.