This is a set of the Yamaha Drums Stool DS550U and the Yamaha Tuning Key DK25. Both were purchased new in October 2024 and have been used a few times. They have been used infrequently and are in good condition. ■ Model Number: DS550U ■ Seat Size: Round seat (diameter 294mm) ■ Seat Height: 37-55cm ■ Leg Shape: 3 legs (single-braced) ■ Height Adjustment: Clamp rod system (without holes/with memory clamp)