The Pelikan Souveran M605 fountain pen in tortoiseshell black is a piston filling pen that uses bottled ink only, and features a body of black and marbled silvery gray striped celluloid acetate, with a black cap and rhodium plated trim. The 14k rhodium-plated gold nib is a very smooth writer, and does tend to run a bit on the wider side. The Pelikan M605 fountain pen is a mid-sized pen that is comfortable in the hand, but not too large for most writers.