FeaturesErgonomic Rollerball Pens Have erasable thermo-sensitive ink Allows you to erase any mistakes you make using the rubber on the end of the penComfortable gripPack of four pens includes one black, blue, red and greenThe Pilot FriXion Set2Go Rollerball Pens (Pack of 4) have erasable thermo-sensitive ink which allows you to erase any mistakes you make using the rubber on the end of the pen. These rollerball pens are ergonomic and comfortable with a grip to help you control your pen. To help you do your bit for the planet, they are made of 50% recycled material and are refillable. The plastic case doubles as a desktop pen holder to keep your pens organised. This pack of four pens includes one black, blue, red and green pen.