The rubber sealing cover protects D-Type chassis connectors from dust and water according to protection class IP65.
XLR D Series male
speakON NL2M* and NL4M*
powerCON 20 A Series NAC3MPA* and NAC3MPB*
etherCON CAT6 Chassis Connectors
BNC D Series
Phono (RCA) Chassis Connectors