SR 359 with 5m lenght is approved compressed air supply tubes with safety couplings for connection to compressed air filter unit and compressed airline breathing apparatus Rubber hose, made of polyester reinforced EPDM. Antistatic, heat resistant. Sundström compressed air hoses are tested and approved together with the following products, and are intended for use together with Sundström SR 99-1 compressed air filter. They are also the only hoses that are approved for use. SR 200 Airline compressed air-fed mask SR 90 Airline compressed air-fed mask SR 307 compressed air attachment SR 507 compressed air attachment SR 63 compressed air-fed hood SR 83 welding hood