GLS Audio Speaker Jack Twist Lock 4 Pole Round - Compatible with Neutrik Speakon NL4MP, NL4MPR, NL4FC, NL4FX, NLT4X, NL4 Series, NL2FC, NL2, Speak-On - 4 PACK Neutrik Speakon Compatible GLS Audio High Quality Guarantee High Quality Material Manufacturing 4 Pack for added savings Original Neutrik Design Specifications