Louisville LP-2210-00 Most popular and economical Adjustable Aluminum Ladder Stabilizer fits extension and single ladders with rail up to 4 inches x 1 3/4 inch. Product measures 12.79” Great for painting around windows, doors, and gutters without damaging them. Adjusts to most sizes easily. Attaches to ladder easily with u-bolts and comes with replaceable heavy duty rubber tips. W x 48.5" L x 2.2" H.