A-B1691328-AI TUBE-BREATHEROne New Aftermarket Replacement Tube Breather Fits Briggs and Stratton (B&S) Small Engines This crankcase breather tube is a direct fit replacement Fits Briggs and Stratton vertical shaft small engines. The breather tube vents crankcase pressure and helps prevent oil leaks by regulating internal engine pressure, keeping the engine running cleanly and efficiently. It is used on many 28 and 31 cubic inch vertical shaft Fits Briggs and Stratton engines