Product Description 40a sp circuit breaker. The product is good to use. The product is highly durable. Manufactured in china. From the Manufacturer Full size 3/4" breakers, 120/240 Volts ac; 10,000 AIR. U.L. Listed as HACR type for use with equipment having motor group combinations and marked for HACR breakers. 15 and 20 amp breakers are also U.L. Listed for switching 120 Volt ac fluorescent lightingloads.