The worldwide standard - In this series the male and female fit in the same hole cut out and are front or rear mountable. The "DL" Series features a two piece unit with solder spring terminations. The "D-L-1" Series features a one piece unit with solder cup terminations. It is RF protected via a 3 point coaxial ground contact to shell of the mated connector. This series is very cost effective. Accessories include male and female rubber dust covers (SCDF or SCDM), DBA blank plastic plate, and DSS color coded labeling plates. Call Us For Low Pricing On Neutrik Parts Not Listed !