Product Description The Beal Prusik cord is a 5.5 mm sewn rope sling made with Technora Aramid core and nylon sheath. It's designed for use as an auto-block knot (prusik) on single or double ropes. Beal Prusik Cord - 5.5 mm Black 50 Cm at REI.com Browse all REI.com deals $18.35 In Stock at REI.com Price verified 2d ago Buy Now at REI.com Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Beal Beal