Fine diameter (.014"), 21 strands, 30 foot spool. Soft Flex Wire is brought to you by state of the art, micro-wire technology. This Soft Flex Wire is constructed of 21 micro woven, stainless steel wires, braided together and then nylon coated. This micro-wire technology gives you the most flexible stainless steel in the world. It is hypoallergenic, and since Soft Flex Wire is marine quality, it can be worn in and out of salt and fresh water. The purpose of our product is to eliminate the frustrating task of re-stringing your designs due to cutting and breakage. .014 was designed for use with freshwater pearls. 2x2mm crimp tubes are what to use with this. However, if you are going to use 2x2 crimps with Fine SoftFlex, and crimping pliers, we recommend giving an extra squish with your pliers after crimping it, to make sure it is secure.