3u, (0.21875" tall) >Value 6u (0.40625 inches) >Value 1u rack drills 3u rack drills 6u rack drills One face of an H950 (36u) rack. 18u device (8/i, FPP12A, etc.) >Value >Value 15u Device (TU10) >Value >Value PDP-8/i (18u) MM8i Memory Expansion (6u) H950 Rack Mount (36u) TC01 DECtape Controller