SIEMENS MBK100A 100-Amp Main Circuit Breaker for Use in Ultimate Type Load Centers, As shown in the image - Walmart.com
Siemens 100 amp main breaker MBK100A | eBay
SIEMENS MBK100A 100-Amp Main Circuit Breaker for Use in Ultimate Type Load Centers, As Shown in The Image - Thermal Magnetic Circuit Breakers - Amazon.com