Cable length: 28cm. Compatible Models: NEJE DK-5PRO-5 laser engraving machine��NEJE DK-8PRO-5 laser engraving machine�� NEJE DK-8-KZ laser engraving machine�� NEJE JZ-5 laser engraving machine�� NEJE JZ-6 laser engraving machine��NEJE DK-6PRO-5 laser engraving machine�� etc all kinds NEJE laser engraving machine Radiator Diameter: 12mm Motherboard Interface: 2.54 4pin