Up for sale is a used Circuit Breaker
for various Mack Semi Truck models.

The part numbers are 11MR38M-6 and/or 20AT1.

Rating: 12 VDC, 20 Amps
Pin out: Blade, 3/4" (19mm) outside to outside
Foot print: 7/8" x 3/8" (22mm x 10mm)
Height: 3/4" (19mm) without pins

Please see photos.
Questions welcome. Thanks for looking.