The Boa transparent MMn is a Twist action ballpoint pen in a flowing design. Material and surface: Tip: brass nickel plated. Barrel and upper barrel: plastic (M-ABS) transparent. Clip: spring steel nickel plated. Standard colours: Barrel and upper barrel: can be combined in 13 colours. Special colours: from 5,000 pcs., without PMS surcharge from 25,000 pcs.. Refill: Silktech L (3,000 m), blue or black, Refill Optional: Silktech XL, Multifill P, Multi-Gel.