Z-Rails are mounting rails for the Eurorack modular synthesizer format and are designed for professional and DIY case mounting assemblies. They're sold in sets of two aluminum, clear-anodized rails, each containing a nickel-plated brass threaded strip with 3mm threads using 5.08mm spacing. The Z-Rails are easy to install into any frame using two M4 screws, one for each side each Z-Rail.

M4 Screws for mounting sold separately