Generac 6829 Maintenance Kit for 15kW EcoGen & 20kW Synergy Standby Generator with Variable Speed 999cc Engine For use with Generac 20kW Synergy & 15kW EcoGen standby generators Keep your generator running at optimum performance Kit includes: air filter, oil filter, AVR filter, (2) spark plugs, oil funnel, chamois, and reminder sticker.