I should mention upfront that this isn't in pristine condition. While there are no critical scratches, dents, or distortions, there is a fair amount of minor rust overall. However, the pistons and slides are in truly ideal condition. Even if you sent it in for repair, I think they'd return it saying no adjustments are needed. The 1st and 3rd slides are smooth as silk. The 1st slide doesn't have a stopper, so I recommend attaching a silicone band just in case. Regarding the 3rd slide, if the stopper is loose, it will easily fall out when you push the piston, so I think silicone bands are a good idea for the 1st and 3rd slides. Currently, I don't have the Yamaha genuine ones, but I've arranged to get some, and if I can get them before shipping, I'll include them. The price will remain the same. O-rings are attached to the 1st and 3rd slides, so they won't clatter when you return the slides. The appearance is a bit rough, but I think you'll be satisfied with the mechanics. A Yamaha 11 mouthpiece will be included. I will gradually lower the price. Thank you for your consideration.