Silver 7 Strand Wire Flat Spools - 0.40mm strand bead stringing wire combines the flexibility and convenience of thread with the strength and durability of stainless steel wire. Specially designed for stringing ceramic, glass, metal and stoned beads as well as seed beads and freshwater pearls. 7 Strand is comparable to Tiger Tail and is nylon coated. This strand is 0.40mm in diameter. The spools contain approx. 30 feet of wire.