This is a quality genuine Janome needle package - excellent value, versatile needles for not only Janome but also for any sewing machines like Brother, Babylock, Toyota, Elna, Pfaff, Husqvarna, Bernina, Juki, Singer, etc. etc.
The purple tip needles is a size 14 ball point needle with a specially designed cobra shaped tip specific for piercing thick layers of fabric, moving between fibres and effectively the best needle for avoiding skip stitches in stretch knit and quilting. Because they are designed to avoid skip stitching, they are also usable with Cover Stitch models.
The red tip needles is a size 14 sharp point, which is good for general sewing of medium weight fabrics. The larger eye makes it great for thicker or corded threads like upholstery or metallic thread, which tends to split.
The Blue tip needles is a size 11 ball point needle which is designed with a longer scarf (indentation on the back allowing the hook to pass closely and form the stitch). The needle works well on light-medium weight knit fabrics and is the recommended needle for light