Risk-Free ShoppingIf you have any questions or problems during the purchasing or not satisfied with the product, please feel free to contact us via Amazon email, we will try our best to give you a satisfied solution. Please rest assured to order, we wish you a happy shopping experience.Satisfy All You DemandThe roller runner suitable for bathroom glass sliding door pulleys and sliding track. Widely used in showers massage cabins, bathtubs, whirlpool and even furniture s. Make your door slides easily and smoothly like silk.Reliable and SturdyThe wheels are made of POM wheel + copper and the screw is made of stainless steel, it has good comprehensive performance, corrosion resistant and rust proof, which makes the product more durable and has a longer service life.Powerful FunctionsThe friction of the roller is small and the mute effect is good, slide smoothly and has strong bearing capacity and good stability. Easy to install, is ideal replacement part of your sliding systems. High quality shower enclosure rollers saves you time and money on your purchase.What You Will Get4 x Shower Door Rollers. Wheel Diameter: 3/4"/19mm. Wheel Thickness: 0.2"/5mm. Steel Part of the Wheel: 7/16"x 0.2"(Dia x H). Inner Diameter: 4/25"/4mm. The package comes with screws, suitable for 4-6mm thick shower door.