The Arca metallic-hg MMn is a Twist action ballpoint pen in a futuristic design. Material and surface: Tip: brass nickel plated. Barrel and upper barrel: plastic (ABS), metallic laquered surface Clip: spring steel nickel plated. Standard colours: Barrel and upper barrel: can be combined in 3 colours. Special colours: - Refill: Silktech L (3,000 m), blue or black, Refill Optional: Silktech XL, Multifill P, Multi-Gel.