New ThreadNanny10 Large BLACK Spools of 3-PLY Polyester Sewing Quilting Serger threads 10 Spools of High Quality 3-PLY BLACK Sewing Quilting Serger Threads High Quality 3-PLY 100% SPUN Polyester 40wt. Each Spool is 1000 Meters (1100 Yards) Good for any home or Commercial Machine Best Quality - Will not Break at High Speed Machines