A&E Signature Thread Silvery Grey Embroidery 4oz Polyester Sewing T40 USA ST105 4 oz. Spool Of Silvery Grey 5,450 Yard Spool Bonded Embroidered Polyester Sewing Thread T40 ---Sews with minimum sewing interruptions. ---Superior coverage. ---Possibility of fewer stitches in pattern. ---Great definition on intricate stitch patterns. ---High luster stitch appearance. ---Higher tenacity than Rayon. ---Very good colorfastness. ---Very good abrasion resistance. Bonded Polyester Thread has superior strength. Polyester thread is a middleweight thread. Typical uses include, but are not limited to sewing auto upholstery, awnings, tents, musical instruments, pool/boat covers, tarps, leather, drapes, sails, and tens. The recommended needle size for sewing with this thread is a size 65 / 9. Specifications Tex Size: 40 Tensile Strength: 1.