2 (One Pair) 1U / 1 SPACE Rack Rails 1 3/4" Lg Tapped 10/32" for Amplifier Rack

2 (One Pair) 3U / 3 SPACE Rack Rails 5-1/4" Lg Tapped 10/32" for Amplifier Rack

2 (One Pair) 4U / 4 SPACE Rack Rails 7" Lg Tapped 10/32" for Amplifier Rack

2 (One Pair) 6U / 6 SPACE Rack Rails 10 1/2" Lg Tapped 10/32" for Amplifier Rack

(1 PAIR) PENN ELCOM 2U / 2 SPACE Rack Rails - 3-1/2" total length sku# R0828-02

(1 PAIR) PENN ELCOM Vertical Rack Rails with Screws

2 (One Pair) 8U / 8 SPACE Rack Rails 14" Lg Tapped 10/32" for Amplifier Rack

2 (One Pair) 10U / 10 SPACE Rack Rails 17.5" Lg Tapped 10/32" for Amplifier Rack