(1) Crossbar ~31"

(2) Sliding Monitor Holders with quick releases

(2) Humanscale Black Quickstand lite VESA Plate Monitor Mount for mounting Screen... that attach to the "Sliding Monitor holders"

(2) Plastic sliding cable guides (slide on the crossbar)

(1) Mounting plastic plate to the Quickstand center position

(3) Screws to attach with the plastic mounting plate and the crossbar to the Quickstand