Bead chain eyes made with stainless steel are much less prone to corrosion after being exposed to saltwater. The stainless steel eyes are also more dense than normal bead chain eyes so your flies will sink slightly better.
Each package contain approximately 10-inches of bead chain. For the Large size, 10-inches equates to about 25 pairs of eyes. For the Small size, 10-inches equates to about 40 pairs of eyes.