These Organ Sewing machine needles are standard needles with a flat shank and regular size eye for most home sewing, embroidery and quilting machines. You get a set of 15 heavy duty sewing machine needles in assorted sizes. To be used for standard sewing projects on heavy fabrics such as denim, corduroy or upholstery. These are compatible with all quality sewing machines, including SINGER, Brother, and Kenmore brands. This set includes (5) size 90/14 for medium weight denim, (5) size 100/16 for heavyweight cotton, and (5) size 110/18 for upholstery fabrics. The Machine needles come in color coded packages