MAYTEX Smart Rods Superior Hold Tension Window Curtain Rod, 18-28-Inch, White EASY TO INSTALL: The convenient, adjustable tension rod doesnt require any tools, have it up in minutes. NO DAMAGE: Featuring rubber end caps that won't damage your walls ADJUSTABLE: the tension rod is adjustable and extends from 18 inches - 28 inches DURABLE: Made of metal and holds up to 10 pounds DIAMETER: 5/8-Inch diameter rod