P152137 Prym universal sewing machine needles. From fine silk to medium-duty cotton to firm corduroy fabric: These premium-quality sewing machine needles are suitable for virtually all natural and synthetic fabrics. The needles slightly rounded tip easily penetrates the fabric . Due to their flat shanks, these sewing machine needles fit any conventional sewing machine and are available in thicknesses 60 to 110. 152137 5PCS