CablesAndKits - 1RU Recessed Rack Adapter - 3" Extension/Recess from Face of Rack - 25 lb (11 kg) Weight Capacity, 12 Gauge Steel - Rail Depth Adapter for Computers, Servers or Network Equipment

CablesAndKits Recessed Rack Adapter, 3" Recess or Extend from Face of Rack, Rail Depth Adapter, Extender, 25 lb (11 kg) Weight Capacity, for Computers, Servers or Network Equipment (1RU)

StarTech.com Server Rack Depth Extender - 2U - 4in / 10 cm - TAA Compliant - Recessed Rack Adapter - Rack Mount Adapter Kit - Network Rack Extender (RDA2U)

Jingchengmei 1U Server Rack Depth Extender - 4-Inch/10 cm Deep -Recessed Rack Mount Adapter Kit for Network Rack (1UEXB)