Best choices for sewing bags such as :Flour bags, fertilizer bags, food bags, cement bags etc. Our threads can be used on NEWLONG, UNION-SPECIAL ,FISCHBEIN high speed sewing machines, proved very good. Feature: 100% polyester virgin threads, enough Strength, enough Length, without knots etc. 150g--200g, 1kg, 2kg, 3kg, 4kg, 5kg etc. You will not regret t odo business with us.