Model Number: SXR80055P.24 Contains 5 refills Multi-colored / Oil-Based Ball Diameter: 0.02 inches (0.5 mm); Ink Color: Black Size: Shaft diameter: 0.1 inch (3 mm); Total length: 3.4 inches (87.7 mm); Weight: 0.04 oz (1.2 g); Compatible products: SXE3-400-05, MXE3-500-05, SXE3-601-05, MXE3-800-05, MXE5, SXE3T-1000000000000000005, SXE3-1-1-18 00-05 Compatible ballpoint pens: Jetstream multi-color multi-functional Jetstream stylus. Super low friction jet ink refill Creates dark, clear drawings Fast drying of drawing lines 0.5mm ball, ink color is black Multi-color multi-function Jet Stream Multi-Color Multifunction 0.