A "Dark and Crisp Write" Straight Liquid Cartridge Dry Erase Marker, Board Master. Nib: Broad Chisel Tip Ink Color: Black Cartridge Part Number: PWMRF8 Other colors are used in some images. Size: Height 4.5 inches (114 mm), Width 1.0 inches (25 mm), Thickness 1.0 inches (25 mm). Product Color Trend:Black