Black ink board master cartridge, 10 pieces, ink thickness 6.0mm. - Brand: PILOT - Product Name: Board Master Cartridge - Contents: 8 pieces - Ink Color: Blue - Ink Thickness: 6.0mm Whiteboard pen Replacement ink and core. Thank you for viewing. All items for sale are blue. 8 pieces. Unused. Comes with the replacement core shown in the image. Thank you. I will take it out of the box and send it with the box. Please understand.