This is a 4-pack of PRO Gallerie Wrap: (20" Center Braces) from Hahnemuhle . They are designed for use with the PRO Gallerie Wrap fine-art framing system. Stretcher Bars in the PRO series are 1.75" deep and 20" or longer in length, meaning that the extra-large dimensions of these frames can sometimes require extra support. These center braces can be used to increase the strength and rigidity of your frame.
Bolster PRO Gallerie System Frame
Use a center brace to bolster the strength of your PRO Gallerie system frame.