Organ’s ELX705 Needles are specially designed for use with serger/overlocker and cover stitch machines. The ELx705 needle system is compatible with most home serger machines. Please consult your sewing machine’s instruction manual for compatible needles. This 5pk of Organ Serger Needles is available in sizes 90/14, and assorted sizes 80/12 x2 and 90/14 x3.