hearthsong 150-foot stainless steel blue backyard zipline kit with adjustable seat, non-slip handles, rubber stopper, and hanging hardware, holds up to 250 lbs. hearthsong turn your backyard into a thrill zone with two sturdy trees and our 150-foot blue stainless steel zipline kit! zooming from point a to point b has never been so much fun. aside from the massive fun factor, our zipline helps kids improve their strength, athleticism, and balance—all while "flying" a few feet off the ground. remove the seat for an even bigger thrill! it's easy to set up, so your kids will be zipping across the yard in no time. they just straddle the adjustable seat, grab the non-slip carriage handles (fully enclosed to keep little fingers safe), and away they go! the all-inclusive kit includes a 150-foot stainless steel cable, tree protectors, fully enclosed carriage with non-slip handles, adjustable seat, rubber stopper, hanging hardware, and detailed installation and safety instructions. install with a slope of 3%. add exciting backyard play to a hot summer day, or up the fun factor at a birthday party!