Compact Rack 3U - 19 inch extension adapted for eurorack modular synth – audiohousing
Amazon.com: RIVECO 3U Wall Mount Rack for Network| Reinforced Heavy Load 66-99 LBS Small Server Racks Vertical & Horizontal Mounting for 19 inches IT & Studio Equipment. : Electronics
UCTRONICS 19 inch 3U Rack Mount for Raspberry Pi 4, with 8 Mounting Plates, Extendable to Support 12 Units of All Raspberry Pi B/B+ Models
Sessiondesk Home Rack 3U - Digital Audio Service
SKB 3U Roto Rack Case 1SKB-R3U B&H Photo Video
Amazon.com: Gator Cases Lightweight Molded 3U Rack Case with Heavy Duty Latches; Shallow 14.25" depth, 3U (GR-3S) : Musical Instruments
OSP RD3U Metal Rack Drawer with Lock, 3U – OSP Cases