This model is an adjustable GPU support, meant to rest discretely on the motherboard side of the graphics card.

Adjustable height, 50mm-75mm

It takes 2 standard motherboard screws (#6–32 x 3/16″)

There is a slot in the bottom for an optional magnet. (12x3mm cylinder)

It was custom made for an NZXT H6 Flow but should work for many cases that have an available spot.