RL YOYO Stool Height adjustable sit-stand stool Backrest & Seat Made With Moulded Foam Dark Grey Fabric Finish Wire-Control Height Adjustable Mechanism Black Nylon Drafting Ring – 445mm DIA Curved ratchet backrest Overall size: 600mm W x 600mm D x 820-1020mm H Greenguard Gold and BIFMA certified Weight rating of 110kgs