This is a numeric code identifying the type of PROM, or programmable read-only memory, card associated with this hardware capability entry, typically relating to adapter identification. An admin working with Cisco TAC on an adapter-identification mismatch uses this code as a precise, unambiguous reference when the human-readable model name alone is not specific enough to pin down the exact hardware variant. A specific numeric code here would map to a particular adapter card type in Cisco's internal reference tables, distinguishing otherwise similarly-named cards.