GIBBON SLACKLINE Slackline This is a 40-foot (12m) slackline set with a safety lock function, perfect for beginners. I purchased it new and only opened it for inspection, but it has not been used for training. The box and instruction manual have some damage. Two tree protectors are also included. I took them out for the photos, but they are unused. - Brand: GIBBON - Product Name: SLACKLINE SET - Length: 40 feet (12m) - Width: 2 inches (50mm) - Lock Function: With safety lock function *Additional note: The width of the line is 5cm. I do not have any pets, and I am a non-smoker.