This is the Gibbon Flowline in 25 meter length with a double ratchet setup for 25mm fluro yellow flat webbing. The ratchets have the plastic spacer to make the 25mm webbing fit perfect. The second ratchets helps to put the double of tension onto the slackline.
Gibbon Flowline Double Ratchet Kit
Due to its good tension in stretching ratio this flat webbing is also ideal for 1 inch beginners to start with. The set allows lines to be set up to 18 m with the simple and easy to understand tension mechanism of using two ratchet.