Edelrid Jul Sahara. The Jul is a beautifully styled single rope belay device with a unique two-component construction. The body is made of high-quality stainless steel offering the best possible abrasion resistance with minimal heat conduction. The synthetic cover prevents the annoying -jingling- on the harness and protects your skin from burning after a prolonged belayor rappel session. An ideal belay device for sport and gym climbing using ropes between 8.9 and 10.5 mm.