GE Q-Line Ground Fault Circuit Breaker, Type THQL Model 3 Self-Test, 120 V AC, 20 A, 10 kA Interrupt, Q-Line Frame, Thermal Magnetic Trip, 5 mA Trip, 1 Pole, 1 ph, 14 to 8 AWG Cu, 12 to 8 AWG Al Wire, Plug-In Mounting, 3-9/32 in H x 1 in W x 2-3/8 in D Dimensions