Matriau: high quality rubber and nylon. The lastic design provides constant tension and firm support. Nylon elastic buckle with plastic ball. Dimensions: lastic cord ball 28 cm, can be shot up to 43 cm; diameter of the plastic ball 2.5 cm; Diameter of the lastic cord 5 mm.Use: the elastic loop passes through the illet to pull the rope through the hook, then pull the loop on the plastic ball. Application: Pull the cord through the hooks/illets and pull the buckle on the plastic ball. Keeps the bche, shade, boat blankets, tents, awnings, flags in a fixed position. Note: Depending on the project, the end of the loop can be hooked an object or other lastic, or the end of the ball can be slipped into a hook or other attachment. Matriau: rubber and nylon of high quality. The lastic design provides constant tension and firm support. Nylon elastic buckle with plastic ball. Dimensions: 28 cm ball string, can be shot up to 43 cm; diameter of the plastic ball: 2.5 cm; diameter of the lastic cord: 5 mm.Use: the elastic loop passes through the illet to pull the rope through the hook, then pull the loop on the plastic ball. Application: Pull the cord through the hooks/illets and pull the buckle on the plastic ball. Keeps the bche, shade, boat blankets, tents, awnings, flags in a fixed position. Note: Depending on the project, the end of the loop can be hooked an object or other lastic, or the end of the ball can be slipped into a hook or other fastener.