These sewing machine needles are made from stainless steel material, which are sturdy and durable for long-lasting use. Qty: 10pcs. Ideal for: Machine Sewing, Stitching etc. 75/11 (Use for embroidery), 90/14 (Use for slightly thick cloth), 100/16 (thick cloth, jeans, etc.), 110/18 (Use for Leather, artificial leather, heavy non-woven synthetics. ).