Renowned for its exceptional strength and versatility, FireLine® thermally fused thread for jewelry-making by Berkley® is the designer's choice for stringing and weaving projects. This popular jewelry-making thread resists abrasion and threads effortlessly. Great for use with Miyuki triangles, squares and Matsuno size 6/0 and 8/0 seed beads. UV protection to withstand sunlight. Fits Wide-eye Needle and #12 English beading needles. Testing for colorfastness is recommended.