Height-adjustable drum stool made by YAMAHA. - Brand: YAMAHA - Model Name: DS550U ■ Seat Size: Round seat (294mm diameter) ■ Seat Height: 37-55cm ■ Leg Configuration: 3 legs (single-braced) ■ Height Adjustment: Clamp rod system (without holes/with memory clamp) ※ Tuning key for memory clamp adjustment is not included. Indoor use only. Non-smoking, no pets. There are a few areas on the seat with slight discoloration that couldn't be removed. There is also some minor surface rust on the metal parts. Please refer to the images for details. The rubber feet are almost not deteriorated.