Artistic doors in finished sand and cast glass; doors with engraved designs in polished polyester lacquer or matte finish. 25° by Arnaudo, Costellazioni and Casa Zen are signature collections by Gianni Arnaudo and Elio Garis offered by Bertolotto. 25° by Arnaudo is inspired by the theme of nature. The designs in the Casa Zen collection are sculpted sand and cast glass inspired by Zen philosophy. Costellazioni draws its inspiration from the heavens, featuring geometric designs engraved by pantograph directly on the door leaf. The "Individual Project" allows customers to select the design that will be transferred flawlessly onto their door.