Specifications: A gleaming adult standard with smooth writing and gentle curves. Filare ef Material: Brass painted shaft Size: Maximum shaft diameter 0.4 x total length 5.7 inches (10.3 x 143.8 mm); Product weight: 0.7 oz (21.3 g); Ink color: Black; Knock-type; Emulsion dye + pigment ink; Plastic packaging included; Refill: EQ-0.5 cores (REQ5).