The C Lon Bead cord offered here is tough and beautiful, but pliable and easily handled when beading, micro macrame, crocheting or other jewelry and craft cord projects. 
It is a heavy triple twisted 100% nylon filament craft and jewelry cord that comes in a large range of bright, lustrous colors. 
C Lon Bead cord is approximately 0.5mm in diameter with a  35 pound break strength. Compare it to Nylon #18 cord.
Each spool has approximately 86 yd. Fits nicely into a size 11/0 seed bead, and fits with room to spare in size 8/0 and 6/0 seed beads. 
You can put this cord right on your sewing machine for heavy duty projects.