The Murray Type MP-T 20A 1-Pole 120V Residential Circuit Breaker in Black is a manual reset circuit breaker suitable for wall mounting both indoors and outdoors. With Type A tripping characteristics and a maximum amperage of 20A, this circuit breaker features thermal overload protection and a trip indicator for added safety. It is designed for easy installation with a plug-on neutral feature and screw terminal electrical connection. With a compact size of 3 inches in height and 1 inch in width, this circuit breaker is ideal for control equipment panels and provides instantaneous break time for reliable operation.