This black Beadalon WildFire thread is sure to be a welcomed addition to your projects. Use this thermally-bonded bead weaving thread when you use seed beads or freshwater pearls for a beautiful appearance. This thread has been thermally bonded and will avoid fraying at the ends and cannot be pierced with a needle. WildFire thread is extremely strong, waterproof, and has zero stretch. Use WildFire thread from Beadalon when you want a superior stringing material that will avoid the common problems associated with typical beading threads. This 50-yard spool has a .008-inch diameter and has been tested for 12 lbs. of strength.