Polly Rope is 100% non-toxic polyethylene plastic cordage designed for the manufacture of bird toys. The unique twist of this Polly Rope prevents unsafe lengths of fray. Also, polyethylene fibers do not have a "memory" like other rope; this prevents entrapment and limb strangulation caused by fibers such as nylon or unsafe cotton rope. 1/8" diameter. 500 feet per roll. Colors will vary.