A-B1798964-AI TUBE-BREATHEROne New Aftermarket Replacement Breather Tube Fits Briggs & Fits Stratton Small Engines This aftermarket replacement breather tube (tube breather) is a key component of the engine crankcase ventilation system on Fits Briggs & Fits Stratton small engines. It allows air to circulate within the engine and prevents the build up of pressure, which can cause oil leaks or damage seals. Replacing a cracked or deteriorated breather tube helps maintain proper