Sterling 1" Mil-Spec

Backcountry.com says:
The military depends on Mil-Spec webbing for its superior strength and abrasion-resistance, so you know you can rely on the Sterling Mil Spec Web Wheel to make secure slings and anchor systems while you're climbing. This wheel comes with 30 feet of 1-inch-thick Mil-Spec webbing so you can make new slings and anchors for a long time. It's particularly great for wrapping around big boulders to make anchors.