The Open Rung Standouts are Ladder Stabilizers made by Levelok. These brackets can be slid into the rungs of most ladders (rung openings of 1 inch or greater) to add stability and work around obstacles like windows. The standout brackets weigh only 1.5 pounds. They are made of aluminum with foam elbows and the manufacturer SKU is ST-ORS-3. Once inserted into your ladder they extend a foot beyond the edge of your ladder. PLEASE NOTE: Foam Elbows are fragile and Not Covered by any warranties. This material is for occasional use, preferably on smooth surfaces, and are easily susceptible to wear and tear, depending on how they are used and the surfaces upon which they are used. For a more durable, longer lasting elbow material, we recommend the Silicone style standoffs or the Silicone style replacement elbows.