Formed by a shell (seat and back) integrated in a single piece, injected in high impact polypropylene with color pigment and antistatic and anti UV additives with textured finishes on the exposed face. It has a thickness of 4.5 mm and thermal transfer in the Lumbar area. With Anatomical And Ergonomic Curves For Greater Comfort Structured With Longitudinal Ribs On The Internal Face For Fixing Structure Consisting Of 2 Die-cut And Bent Plates In The Shape Of A "Z" Of 14 Cal Steel Sheet And 2 Tubes Of 25.4 Mm. (1 ") Cal.16 Formed And Punched On Both Ends For Installation To The Floor All Metal Parts Are Joined Together With Micro-wire Welding That Does Not Leave Slag. Finishes The previously degreased and phosphatized structure is protected with polyester paint, micro thermoplastic Epoxy powder applied with electrostatic equipment and baked at 200 ° C. The shell is fixed to the structure by means of 4 "Pop" type rivets No. As-88 of 6.35 mm. (1/4 ") by 19.05 mm. . (3/4 ") Grip (2 Per Side).