The HARDCORE Marker is a refillable felt tip marker with a 15mm replaceable tip. It uses water-based pigment ink, and has a pump system for optimum flow control. It is light-fast, waterproof and abrasion-proof, and writes on any surface. Available in 10 vibrant colors (White Cloud, Blue Sky, Blue Hour, Red Signal, Orange Scream, Amber, Green Dream, Silver, Gold, Black Night). Contents: 45g