Specifications: Board marker EZ medium tip ink cartridge. Material: Case/Cap Resin; Body Size: Maximum Shaft Diameter 0.7 x Total Length 3.5 inches (17.7 x 90 mm); Product Weight: 0.4 oz (12.6 g); Ink Color: Blue; Quantity: 1; Body: YYS17-BL, YSM17-BL