Rail kit includes left and right rails (2 rails included)
• For use in rack cabinet with mounting holes distances of 23.5 inch ~ 36.5 inch (595 ~ 936mm)
• Maximum loading up to 77.16 pounds (35kg)
• Supports 440mm wide 3U or 4U chassis
• Compatible with SilverStone RM44 / RM46 / RM47 / RM51 / RM52