Old GE panel early 1970s, want to replace breakers with GFCI/ AFCI, which BRANDS are compatible? is this 3/4" or 1/2"? What should I be looking for when looking for compatibility and
GE THQL1120GFTP Single Pole Self-test 20A 120V GFCI Ground Fault Circuit Breaker 783164485813 | eBay
GFCI Breaker (Ground Fault Circuit Interrupter) | GE Industrial | ABB US
GE 15 A 120/240 V 10 kA at 120/240V GFCI Circuit Breaker