New ThreadNanny 5 White & 5 Black Spools of HEAVY DUTY 3-PLY Polyester QUILTING SERGER SEWING Threads 10 Spools of HEAVY DUTY 3-PLY 5 BLACK and 5 WHITE Sewing Quilting Serger Threads High Quality 3-PLY 100% SPUN Polyester EXTRA STRONG. Each Spool is 900 Meters (approx 1000 Yards) Good for any home or Commercial Machine Best Quality - Will not Break at High Speed Machines