Produced by Briggs and Stratton. All parts needed for a standard service of your engine (model 28, Model 31 I/C OHV, 14. 5 - 18. 5 Gross HP vertical). Includes oil, oil filter, spark plug, air filter and pre-filter. Before buying, please check part compatibility via your engine's Operator's Manual or Illustrated Parts List available on the Briggs & Stratton website.