Specifications: Smooth writing. Durable stainless steel nib SA-R Product Size: Shaft Diameter 0.3 x Thickness 0.5 x Total Length 5.9 inches (8.8 x 13.2 x 151.0 mm); Body Weight: 0.3 oz (7.7 g); Ball Diameter: 0.03 inches (0.7 mm); Ink Color: Blue; Mechanism: Cap Type; Refill: SA-7N