Werner 97P Adjustable True Grip Stabilizer and Surface Protectors for Extension Ladders Span adjustment 49-inch, 57-inch or 65inch Stand off distance 12-inch or 29-1/2-inch Rectangular stabilizer spans double windows Fits rails up to 3-inch by 1-3/16-inch This comes with 1 stabilizer, rubber pads, fleece bonnets, mounting hardware and instructions