The Ergoline lightweight metal frames combine patented features and the highest quality. The robust side panels made of anodized aluminium profiles are screwed into housing and therefore easy to replace. Moreover, the Ergoline products can be supplied with tapes equipped with the patented FLEXTOP fitting which reliably prevents breakage at the tape commencement. The Ergoline series frames excel in durability and operating convenience. Isolan - Steel yellow enamelled printed graduation, protective polyamide coat.