The Hope Mono M4 Large Bore Caps are colored inserts for the Mono M4 caliper. Priced for one insert. It fits the larger bore cap hole on the caliper. A small M4 bore cap would be also be needed to fully outfit one Mono M4 Caliper. You would also need a Mono M4 large bore cap tool to install them - see our store - we sell it. Choice of Black, Blue, Gold, Red, Silver or Gun Metal Anodized.
