Asus ProArt Display PA279CV 27" 4K HDR Monitor - Manual (Page 10)

1-2 Chapter 1: Product Introduction
1.3 Assembling the monitor
To assemble the monitor :
1. Align the screw hole on the arm with the bundled screw on the base.
Then insert the base into the arm.
2. Fix the base to the arm by fastening the bundled screw.
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*Base screw size: M6 x 17mm