Material: Copper + stainless steel + nylon, bold copper shaft, wear-resistant, no rust and 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. These spring-loaded guides easily replace old or broken roller guides for a smooth glide.Pulley bearing capacity, good stability; Small friction coefficient, good mute effect.Easy installation, often used for bathroom glass sliding door pulley/sliding track., Manufacturer: KUARWDVF