Three-Shelf Test Instrument Trolley / Cart. Rugged cart built from extruded Aluminum designed to support 175 lbs of equipment. 53 in high x 28.5 in deep and 30 in wide. Top shelf at 53 in for keyboard/mouse with LCD panel mount arm suspended above. Full-depth middle shelf at 34 in high for instruments, and half-depth bottom shelf for UPS / isolation transformer and / or heavy CPU. High-quality 5 in casters: two swivel/locking, and two fixed. 3/8 in HDPE shelves.