21PCS WP 17 18 26 Series TIG Torch Consumables Kit 54N Ceramic Nozzle Gas Lens-Collet-Body Back Caps 54N01 Insulator Gasket Fit for SR DB WP 17 & 26 series air cooled torches and 18 series water cooled torc Package including 54N series nozzles, collets, gas lens collet bodies, back cap and insulators.