What you need are two trees or poles that are 8 meters apart and can withstand a force of more than 300kg: install the accessory in the buckle of the red flat rope and fix the two ends of the flat rope on the tree or pole. Play and Exercise: This backyard hanging obstacle course kit comes with a variety of multi-skill-level obstacles that allow kids to train harder and harder by moving the obstacles further apart as their skills improve. Manufacturered by HGYYIO. Free Gift: We advocate protecting nature so you will get tree protectors for free. Always use tree protectors when installing Ninja Line because it will protect the trees and your monkey line. A set contains: 2 upper and lower flat ropes 1 balance rope 1 swing rope 1 round disc 2 rings 2 cross bars 3 knobs 4 tree protection sheets 11 locks buckle. Unique point: The shortest distance is 6 meters and it can withstand 300kg of force. Convenient and Portable: Our product can be quickly and safely set up almost anywhere. All you need is two mature trees pillars beams or bars and can withstand a minimum force of 300KG.