perfect for Loudspeaker Connections: 4 pole speakon cable connector, chuck type strain relief. The plugs has PVC protection, good thickness and good shielding noise. Precise Quick Lock System: Designed with extremely precise locking system, improved screw-type termination for highest pull-out force, making it more user-friendly. Compatible: These connectors are with high adaptability, compatible with for speakon NL4FC, NL4FX, NLT4X, NL2FC. Any 2 or 4 Pin Compatible: These Socket Connectors can Work in Any 4-Pin or 2-Pin Speakon, stress relief designed for 10 to 16 gauge AWG cables. Colour:blue Material:plastic Package Contents: 8 * Audio Cable Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.