Throw them away. These are generally o-rings, springs, or other items that experience wear and tear with the usual usage. These are the items that are a part of the service kits provided by the manufacturer. The manufacturer has deemed these items as needing to be replaced within their time frame and we’ll always replace all items in the manufacturer service kits. The bags will include any parts beyond standard manufacturer kits that needed to be replaced. These bags are sent back simply for you to see what was done. It’s not useful beyond that point and can be discarded.