This is the ultimate gray rendering kit. The Gray Ink Pro is ideal for storyboard artists, industrial designers or anyone who likes to make renderings in shades of gray. It contains 1 Wide marker, 3 Sketch markers from our cool gray blending family and a gray various Ink refill bottle, 2 gray multiliner SP"s (0.3 and brush) 1 black multliliner SP (0.3) and 2 SP refill cartridges (gray and black). All contained in a black book style case with an extra slot for your own pencil or pen. If you want a complete set of gray rendering tools then look no further that the Gray Ink Pro. Sketch Markers - C3, C5, C7 / 1 Wide Marker C3 / 1 Various Ink C3. 2 Gray Multiliner SP 0.3, BS / 1 Black Multiliner SP 0.3. 1 Black SP Refill/1 Gray SP Refill. Wallet Dimensions: 5.25"" x 7.5"" x 2"".