Part # : DBx1 Groz Beckert Gebedur Titanium (the alternative part number are 16X231, 16X257, 16X95, 1738, 1738A, 287WH, 71X1, DBX1, DBX257, SY2254, SY2270) THIS LISTING INCLUDES : Box of 100 Groz-Beckert Gebedur Titanium Industrial Sewing Machine Needles. Gebedur stands for Groz-Beckert needles with titanium nitride coating. The titanium nitride coating on the surface is extremely hard so the needle is extremely well protected against damage and wear, especially at the point of the needles. Groz-Beckert Gebedur Tintanium needle features : Higher processing security Less material damage Less needle deflection, resulting in less skipped stitches, thread braking and needle breakage Higher productivity due to less downtime of the machine. Groz-Beckert DBX1 Gebedur Titanium needles are available in following sizes : Singer Size 10 (Metric Size 70) Singer Size 11 (Metric Size 75) Singer Size 12 (Metric Size 80) Singer Size 14 (Metric Size 90) Singer Size 16 (Metric Size 100) *A needle system is a group of needles made to fit specific sewing machines. All needles in a system are of the same length and shank size, but are of various diameters. Lower size numbers are narrower or thinner needles used for lighter materials. Higher size numbers indicate a needle of thicker diameter, used for heavier materials. Match your needle system to your machine, then the size of the needle to the product you are sewing. About more machine brand and models this item will fit for ,please see from the posted photos