4 Needles Per Package. Serger Type J (ELX705) Size: 80/125 German-Engineered Steel Machine NeedlesThe sharp point penetrates all types of fabrics for a professional serged finish. Works with polyester, cotton, rayon, and polyester/cotton blend threads. Use the needle system recommended by your serger manufacturer. This needle is designed for use in electronic multi-purpose sergers that do overlock, cover, safety and mock-safety stitches. Machine should specify ELX705 system.