All BRP calipers are machined from billet aluminum,The housings are low proflie,but strong allowing less flexand better brake feel.
They have internal crossovers for less chance of leaking

REPLACEMENT PARTS

Piston (each) - BRC230-7531
Piston O-Rings (4 pack) - BRC225-2655
Crossover O-Rings (4 pack) - BRC225-2583
Bleeder screws (4pack) - BRC220-0064
Replacement bridge bolt - BRC190-4100
Pad wear plate (each) - BRC300-5876
Replacement bolt (each) - BOL0062507H