LA Linen Thread 100% Polyester 6000 yards spool, Serger, Overlock, Single Needle, Royal Blue 100% Spun Polyester 6000 Yard Cone Use for Serger, Overlock, Merrow, single needle etc. Color fast yarn dye The digital images we display have the most accurate color possible. However, due to differences in computer monitors, there may be variations in color between the actual product and your screen