Material: Copper + stainless steel + nylon, bold copper shaft, wear-resistant, no rust, this gives the product more durability and longer service life Shower Door Roller FEATURES: Shower rollers for curved doors bearing capacity, good stability; Small friction coefficient, good mute effect. silent effect is outstanding, can be a good replacement for your old or broken roller This gives the product even more durability and longer service life. INSTALLATION CONVENIENCE: First use a screwdriver to loosen the shower roller wheels and remove it, then replace the new pulley, tighten the matching bolt to complete the replacement of a pulley. Suitable for most shower enclosures, shower cabins and steam cabin enclosures.