The difference between SBM-CMM-001+ and SBM-CMM-001 is the IPMI chipset is embedded to PCB board for SBM-CMM-001+. SBM-CMM-001 is using add on IPMI card. The enclosure did not include SBM-CMM-001+ and SBM-CMM-001 as standard package. User need to order it separately. If your customer is using SBM-CMM-001, then you could order SBM-CMM-001.