The Safari (Tortoise) desk sets are build on the Retro 51 tradition with a fresh new look utilizing high quality materials and careful construction. This round shaped desk-set is made out of tortoise cellulose acetate with chrome accents. A smooth rollerball is always at your finger tips with these desk sets. They are based after original 1950's designs and made with cellulose acetate, a popular material used in that era. Each desk set is outfitted with a rollerball refill for the smoothest writing experience.