great set. There were a few O-rings that were not included. not very clear documents showing exactly what is included. There could be an illustration showing and matching the exact o-ring photos with location description. I'm an experienced mechanic, so I'm well versed in a particular job. but it will be difficult for a beginner to know exactly what o-rings to use and where to use them, some of them are very similar in size and this work takes many hours so no one wants to go back after assembling just because two O-rings are mixed up and leaking! but overall a great quality product with factory quality viton o-rings where needed.