This Nite Ize kit gives you four small black plastic Figure 9 rope tighteners for pitching a tent without tying a single knot. Each Figure 9 weighs about 2 g and has the instructions moulded into it. Loop or fix the line, wrap it through the prongs and pull it taut: the line stays tight in wind and weather, and is easy to slacken when you strike camp. The kit includes four 8 ft (2.4 m) green reflective guy lines, 2.5 mm thick, which catch torchlight so they are easier to see at night. Each tightener fits cord from 2 mm to 5 mm, so it also works with your own cord on tarps, flysheets, shade nets and washing lines.