LEONIS 24 Color Sewing Threads [ 93010 ] Thread(Polyester 100%), Core(Polyethylene), Needle threader(Aluminum), Case(Polypropylene). 24 collor all-purpose sewing threads. Quality Design by Leonis. Polyester 100%. 50 yards each, in transparent case. With a needle threader. Useful for both hand sewing and machine sewing. Available for sewing small articles or mending clothing.