Product Info Catalog Electrical & Lighting Fuses & Circuit Breakers Circuit Breaker Accessories Self-Test GFCI Breaker, Single Pole, 20-Amp Self-Test GFCI Breaker, Single Pole, 20-Amp Self-Test GFCI Breaker, Single Pole, 20-Amp Request a Quote UPC: 887621216559 Manufacturer: Siemens Industry Inc SKU: 216746 Model Number: QF120GFA Ite/Siemens, 20a, 120v, single pole, 1", self-test ground fault circuit interrupter breaker, 1" space.