'This hinged cover seals D-size chassis connectors against water, dust and dirt in undocked conditions to IP42. It is available in different colors.SCDX - black (if used with opticalCON, black indicates multiple mode)SCDX-5 - green (if used with opticalCON, green indicates single mode APC)SCDX-6 - blue (if used with opticalCON, blue indicates PC single mode)SCDX-9 - white (e.g. wall socket)Suitable for:XLR D Series femaleXLR D Series male1/4'' D Series jackspeakON NL2M* and NL4M*powerCON 20 A Series NAC3MPA* and NAC3MPB*powerCON TRUE1 NAC3MPXUSB NAUSB-W*HDMI NAHDMI-W*D-SUB NADB*Firewire NA1394-6-W*etherCON A&B SeriesetherCON D SeriesChassis ConnectorsetherCON CAT6BNC D SeriesChassis ConnectorsPhono (RCA)'