Gibbon Slacklines Classic Kit (49-Feet/15-Meter, Red) Most-bought slackline in the world, Gibbon's classic line is ideal for beginners and all-rounders Set offers simplicity and durability, and is most widely used slackline set in school gyms and for training purposes Original 15-meter red model with 50-millimeter width, for low mounting height and safe handling Two-part set for fast assembly and disassembly TUV-approved; 4T maximal load