One project has eight spools with each one 3,000 yards，total 24,000 yards. This product works on most brands of sewing machines or high-speed sewing machines, We have adopted advanced twisting technology and air splicing technology, almost no joint in one cone, use electric control of the silicone oil, more stable quality, you can use more smoothly, no longer worry about for the break off. The sewing thread is made of high-quality 100% POLYESTER, polyester is soft and smooth with high strength .it is not easy to be fraying or breaking, not discolor or shrink. The color fastness to washing and sunlight could be over level 4 , the mean value of breaking strength above 11 N. breaking CV (%) in 5.5-7.5, hairiness ratio of 4mm is under 0.3, We attach great importance to the quality of products, make sure when you use it more smoothy. We provide 30-day money-back and 12-month warranty. Feel free to contact us if you have any concerns