SuperFlex -The CK 17 series torches are the most popular torches on earth. These torches are constructed with a hardened brass alloy head to reduce thread damage which also helps prevent galling and seizing of the collet body. CK torches have the largest metal head insert and this insures maximum cooling and longer life. The silicon rubber hose connection with a nylon over-braid resists abrasion and stays flexible even in cold environments. The 17 series torches are rated up to 150 amps and accept CK 3 series (10N) consumables.