Erasable Ballpoint Pen: The FriXion Series 4 color ballpoint pen has arrived a wood model that allows you to feel the warmth of the wood. The grip part is made of wood and the grain of the wood is used, so each piece has a different pattern. Written letters can be erased with friction heat by rubbing the included rubber. Smooth gel ink writes excellent.. ◆Ink Color Black, Red, Blue, Green ◆Extra fine 0.5mm ball ◆Refill : LFBTRF30EF (Black, Red, Blue) : LFBTRF12EF (Green) Cannot be used for certificates or addresses..