ServTray Complete, 19' , 16-Port KVM Switch Module, USB and PS/2 KVM module with power supply Universal rear rail kit (includes [2] brackets, [2] extenders, and [8] screws) (10) 0.19' x 0.43' (0.5 cm x 1.1 cm) screws (10) 0.12' x 0.24' (0.3 cm x 0.6 cm) screws User's Guide