36 in, Depth 4 3/4 in, For Use With GE THQL Circuit Breakers, Bus Material Aluminum, Short Circuit Current Rating 22kA, Enclosure NEMA Rating 1, Cover Attachment Style Screw On, Cover Closure Method Door Handle Load Center, 42 Spaces, 225 A Amps, 208Y/120V AC, THQL Circuit Breaker Type.