The Chain Rule.  In Calculus, the Chain Rule is a formula for computing the derivative of the composition of two or more functions.  Our 210BL is an Extremely Functional 2.2mm Cable Chain composed of Bright Sterling Wire.  You don’t have to be a Math Genius to know you have a winning equation with this Bulk Jewelry Chain.  Choose from one of our many Sterling Silver Clasps and Closures to finish your Necklace or Bracelet Design. Note: Bulk chain is priced per inch. All chains are sold in 12 inch minimum quantities unless a 10 foot minimum is noted. We may use segments of 7 inches or longer to fulfill your order if continuous lengths are not available. Spooled lengths are segmented at the factory so we cannot guarantee continuous lengths of any specific measure.