High horsepower rating of 20 hp. Compact design. Gull wing shaped brass terminal pressure clamps. Constructed of glass reinforced thermoplastic. Two point contact arms. One piece contact carrier. UL 508 and cULus Listing of individual device and assembled device within enclosure. Heavy duty zinc plated steel strap. Two brass rivets secure strap to housing. External screw pressure plate back and side wire terminal screws unstaked for use with ring terminals. Oversized silver alloy contacts. 2-3/4 in hubs (7812-EX and 7813-EX). 2-1/2 in knockouts on back and 2-1/2 in, 3/4 in knockouts on top and bottom (7812-P, 7813-P, 7806-P). 2-1/2 in knockouts on bottom and back (7832 and 7833).