Muggy Weld SSF-6 56% Silver Solder Starter Kit Contains: 4 x 18" x 1/16" diameter flux-coated rods 1" of our high content silver solder will flow 18" the only silver solder with this capability Cadmium-free: Ideal for food and pharmaceutical applications Can be used on: Steel, Stainless Steel, Cast Iron, Copper, and Brass - in any combination High Strength: 71, 000 psi