Instructions for use:After turning the telescopic screw counterclockwise to the required support height, then turn the middle fixing ring clockwise to the end to lock and fix it.Product features: The graphics card bracket adopts a retractable screw design, which can provide a 26-50mm height support interval, and can be used at the bottom of the chassis and the power compartment.Model: -20MINIProcess: AL6061 sandblasting/anodeColour:blackMaterial:aluminumSize:Product unexpanded size: 15x15x26mmWeight: 24gPackage Contents:1 x -20 MINI graphics card bracketOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.