Eagle Series Zipline. A zipline kit is one of the most exciting items you can put in your backyard, for hours of enjoyment! Brand 44 Ziplines help improve strength and balance, all while riding a just a few feet off the ground. A zipline consists of a pulley suspended on a cable that is mounted on an incline. The user is propelled by gravity to travel from the top to the bottom of the inclined cable, by holding on or attaching to the freely moving pulley! Ziplines come in many forms. They may be short and low, or long and high. The Eagle Series includes a seat, which increases the length of the ride and helps reduce the riding height needed as riders don’t hang as low. A specially designed hardware bracket allows rope and seat length to change for different riders heights!