G Type DIN Rail 32 x 15mm are made of Cold-Rolled Steel , Surface Treated by Yellow Passivated or Zinc Plated.
It named after the G shape they form, these feature a deeper recess at one side than the other. The deeper of the two outer channels on a G-section DIN rail is usually positioned at the lower edge when the rail is panel-mounted, offering additional support for any heavier or higher-powered components you may wish to attach.