IMPORTANT NOTICE: HARDWARE PACKAGE IS ATTACHED ON THE BOTTOM OF SEAT CUSHION. MODEL: B220: 0620 xt 2x1 xs (4x1 Ex ext {Axa fmm MECHANISM SCREW [3 ig MEME SCREW Customer Service Hotlink: 1-800-593-1888 For further assembly instructions, please visit our website at www.hosschair.com is completed, fully tighten all screws before using. This chair is only intended for sitting.