This product was engineered to provide safe fun for ages 8 to 14 years when the instructions and rules are followed. For best and safe results please read and follow all instructions carefully when installing and riding your RIPLINE ZIPLINE. Obey all safety rules at all times. A. (1) Trolley with sealed ball bearing pulleys. Non-slip hand grips. B. (1) Main Cable length varies with model, 3/16in (.48cm) galvanized steel F.. cable, with looped eye on one end. C. (1) Sling Cable 5ft. (1.53m), 3/16in (.48cm) steel cable w/looped eye. D. (1) Turnbuckle 6in (15.24cm) Steel w/ 2 eye bolts & nuts. D. C. E. (3) U-clamps 3/16in(.48cm) with thread cover caps. F. (1) Seat and Rope Only included with kits with seats. Seat color varies.