Persian Wheat Chain is by far the best and strongest chain available on the market. It is available in 3 different sizes (Baby, 1mm and 2mm) and 3 different lengths (16″, 18″ and 20″). We do have longer lengths available. If you would like to order 22″-30″ please call us toll free 1-888-477-8571.All of our chains come with a Lifetime Warranty against breakage. If your chain breaks for any reason just send the pieces back to us and we will send you a brand new chain! The 1mm is the one pictured in the middle with the #4 M-dot pendant (sold separately).