NL2FXX-W-S Series:

2 pole speakON®  cable connector, screw terminal assembly, chuck type strain relief for cable diameters 6 to 12 mm

NL4FXX-W-L Series:

4 pole speakON®  cable connector, screw terminal assembly, chuck type strain relief for cable diameters 10 to 16 mm

NL4FXX-W-S Series:

4 pole speakON®  cable connector, screw terminal assembly, chuck type strain relief for cable diameters 6 to 12 mm