Check the listing for details. GENUINE ECHO AIR FILTER KNOB FITS CS-510 CS-520 + MORE A235000000. Condition: New. Listed at 10.51 USD. Part A235000000 (THUMBSCREW) Where Used: · 402s S/N: C37414001001 - C37414999999-->ENGINE COVERS · 402s S/N: C37513001001 - C37513999999-->ENGINE COVERS · 402s S/N: C69915001001 - C69915999999-->ENGINE COVERS · CS-510 S/N: 03001001 - 03999999-->Engine, Short Block, Engine Cover · CS-510 S/N: 04001001 - 04999999-->Engine, Short Block, Engine Cover · CS-520 S/N: 05001001 - 05999999-->Engine, Engine Cover · CS-520 S/N: 07001001 - 07999999-->Engine, Engine Cover · CS-520 S/N: C07113001001 - C07113999999-->Cylinder Cover, Fuel System, Ignition Switch, Intake · CS-520 S/N: C09312001001 - C09312999999-->Cylinder Cover, Fuel System, Ignition Switch, Intake · EB770 S/N: P53715001001 - P53715999999-->INTAKE / AIR FILTER · EB770RT S/N: P52115001001 - P52115999999-->INTAKE / AIR FILTER · EB802 S/N: P34313001001 - P34313999999-->Intake · EB802 S/N: P37011001001 - P37011999999-->Intake · EB802 S/N: P43814001001 - P43814999999-->Intake · EB802 S/N: T13512001001 - T13512999999-->Intake · EB802RT S/N: P34413001001 - P34413999999-->Intake · EB802RT S/N: P37111001001 - P37111999999-->Intake · EB802RT S/N: P43714001001 - P43714999999-->Intake · EB802RT S/N: T13812001001 - T13812999999-->Intake · EB854 S/N: P43614001001 - P43614999999-->INTAKE · EB854 S/N: T14112001001 - T14112999999-->INTAKE S/N: T14112005021 - T14112999999 · EB854 S/N: T14211001001 - T14211999999-->INTAKE S/N: T14211001841 - T14211999999 · EB854 S/N: T14313001001 - T14313999999-->INTAKE S/N: T14313001313 - T14313999999 · EB854RT S/N: P43514001001 - P43514999999-->INTAKE · EB854RT S/N: T14412001001 - T14412999999-->INTAKE S/N: T14412007241 - T14412999999 · EB854RT S/N: T14511001001 - T14511999999-->INTAKE S/N: T14511001541 - T14511999999 · EB854RT S/N: T14613001001 - T14613999999-->INTAKE S/N: T14613001733 - T14613999999