The GMSN! Pure Rails are designed in house to be lighter than most other rails and considerably cheaper too!
As with all GMSN! stuff, cheap does not mean crap! At the end of the day a rail is just a single piece of metal, no moving parts, no lengthy design and test cycles. Just a quality, anodised, lightweight rail to mount synth modules.
These are available individually or as a complete 6U rack kit.