KoolGrips Kool Comfort Handrail Cover for in-Ground Swimming Pools | 1.9-Inch Diameter with Zipper (4' Long, Desert Tan) The Koolgrips "Kool Comfort Cover" provides a slip-resistant grip for your railings. 4' Length. Fits up to 1.9" diameter ladders and hand rails for a tight fit. Sold Individually