The Trias structure/transparent is a Retractable ballpoint pen in an extraordinary hexagonal design. Material and surface: Barrel and push button clip: plastic (M-ABS) transparent, Barrel: structure in drop optic. Standard colours: Barrel and push button clip: 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: