I have 19 colors of hard to find Silamide beading thread in both 40 yard cards and 100 yard spools. IF a color of 100 yard spools is out of stock, three 40 yard cards will be substituted.This is a strong nylon thread and is lightly waxed. Unlike some of the other beading threads on the market, the fibers will not fray or break while you are beading. Choose a thread color or value to match the beads you are beading with. This will help camouflage the bits of thread that remain visible when you make bead embroidery stitches. Switch to FireLine beading thread when beading with crystals or large metal beads, as both will cut through Silamide.