Perfect for digitized designs for 40wt emboidery threads. Rayon provides superb coverage and sewability. For best results, choose the right stabilizer for the project and use Gütermann 100% Polyester Dekor bobbin thread in the bobbin. Loosen the top tension of the sewing machine to 2.5-3.0g when using. Grey spool colour. TKt No. 110, Tex: 27, Dtex: 270, 2-ply. Suggested needle size: US 10/12 (70-80).