BOOSTER ELEMENT, 2-1/2" SQ FLANGE,;[ 208V 5000W 1PH ] [ 1-3/4"OC BOLT HOLES~; 11-1/2"L;INSIDE ] [TERMINALS {SCREW 10-32} # 26-2345 INCLUDED, ;[ INCLUDES GASKET 32-1166 ];HATCO BOOSTER COMPACT (5 & 15 & 30KW),;HEAVY DUTY (15 & 30 & 45KW),;IMPERIAL & POWERMITE (15 & 30 & 45KW).