A modern curtain rod with a sophisticated touch Blok is a 1 in. diameter adjustable curtain rod with a gunmetal finish and wooden cylindrical finials. Blok can fit a variety of window sizes. Made of steel supporting a maximum weight of 22 lbs. this curtain rod is durable and long-lasting. Installation is super simple. Blok curtain rod can be used with grommet back-tab rod pocket and tab-top curtains.