Check the listing for details. Singing Rock Duran 10.4mm X 70m Blue Climbing Rope - Durable and Reliable for. Condition: New. Listed at 248.32 USD. The Singing Rock Duran 10.4mm X 70m Blue is a high-quality climbing rope designed for optimal strength and durability on the toughest of climbing routes. Made with a 10.4mm diameter, this rope provides a perfect balance between lightweight performance and robustness. The vibrant blue color makes it easy to spot on the wall and adds a stylish touch to your climbing gear. With a length of 70m, this rope is suitable for a variety of climbing applications and offers plenty of reach for longer routes. Trust in the Singing Rock Duran rope for a safe and reliable climbing experience every time.- The Singing Rock Duran 10.4mm X 70m Blue is a durable and reliable climbing rope that will keep you safe and secure on your next outdoor adventure.. - Made from high-quality materials, this rope has a.