【Easy to Use】The Weld bung and plugs was easy to weld and offer fantastic value for the user;【High-Quality Material】O2 Oxygen Sensor Plug M18 x 1.5 is made from 304 stainless steel. ;【Durability】Reusable, high rusting resistance in extreme environment, capability not to deform with time.;Designed to adding in any place you need one aftermarket exhaust or downpipe.