Comparison : Item # MNP-118, CGA-280 Nipple-Threaded Inlet
Item # MNP-118, CGA-280 Nipple
Item # MNP-118CV, CGA-280 Nipple w/ Check Valve
Item # MNP-118R, CGA-280 Nipple w/ Filter
Item # NP-118, CGA-280 Nipple-Threaded Inlet