5-PACK NEEDLES: This set of 5 Superior Threads serger needles are sized #90/14If your machine manual recommends a 130/705H (Universal Needle) needle style, the HAx1SP can be used in its place DURABLE METAL: Chromium-plating extends the life of these Serger needles so you spend more time sewing BEST USE: The size #90/14 needles are great for heavier (thicker) and decorative serger threads SERGER NEEDLES: The HAx1SP needle is the standard, go-to needle style for Serger and Overlock machines BEST USE: For use with 3-thread and 4-thread sergers; If your machine manual recommends a 130/705H (Universal Needle) needle style, the HAx1SP can be used in its place