Do not tighten all bolts until them haven been installed in corresponding locations. “+” in below list indicates that additional pieces are replacement parts. 2 ×1PC 1 ×1PC Bolts M6*18mm Leg Leg Seat B×4+1 A×2+1 3 ×1PC Bolts M6*30mm C×1 D×2 Allen Key Leveling Feet 2 for replacement Step2 Step1 3 C B 2 3 D 1 C Make sure the label faces front. A 2 Step3 Step4 1) There are 5 positions for the chair.