This item was received from an acquaintance. I am not familiar with musical instruments, so I do not know the details. A friend who can handle instruments has taken care of it. There is some sticking on the main tuning slide. There is no sticking on the 1st, 2nd, and 3rd valve slides. However, the 2nd valve slide has some stiffness. The pistons move smoothly! The screw under the piston (2nd) is stuck. For an additional 4,000 yen, the main tuning slide and the screw under the piston can be repaired at a musical instrument store. If you would like repairs, please comment before purchasing as it will take some time to ship. Valve oil is included, but there is only a small amount remaining.