THQB32020 - General Electric Bolt-On Circuit Breaker Older Style (yellow background).  THQB32030 breakers with blue background (newer style)  - sold in a different ad) 

General Electric THQB series three pole 20 ampere bolt-on molded case circuit breaker with maximum voltage rating of 240V trip type thermal magnetic common trip and standard interrupting rating of 10 kiloampere at 208V complete with 120V shunt trip (LI) Long-Time and Instantaneous trip functions and load side lug terminals.