Keep your mower running smoothly, season after season. This kit is for walk-behind power mowers with Briggs & Stratton engines. The kit contains 20 oz. SAE 30 engine oil, spark plug, air filter and fuel stabilizer. The easy-to-use kit includes a Toro replacement air filter, a replacement spark plug, a 20 oz. bottle of Toro walk-behind power mower engine oil and a packet of fuel stabilizer.