ROPE LOGIC TREX ULTRA RING SLING #1 by Ultra Ring Save 0% $134.99 SKU SLING-ULTRARING1 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Multiple pockets allow for hassle-free, knot free adjustment. This Ultra® sling is made with the ultra-strong 1/2" Teufelberger tREX line and the #1 Notch Rigging Thimble.