[Durable]: Extendable ball tensioner with ball, elastic rubber rope, durable and weatherproof. [Material]: The tarpaulin tensioner adopts a new thickened material with a diameter of 4mm, providing better strength in all conditions. [Load capacity]: As an elastic tensioner, it is 'a relatively small elastic ball, which cannot withstand heavy loads. [Widely used]: The ball tensioner is suitable for awnings, tarpaulins, parasols, sleeping bags, fixed household items, tents, awnings, wall pipes, fishing rods, screens, awnings, etc. Product material polyester + rubber + PP Product specifications: total length 15cm, rope diameter elastic 4 mm, diameter of the ball 27 cm.