Replacement shower door roller with 23mm wheel diameter. This shower door roller is easy to make slide movement and is designed for use with 4-8 mm glass doors. The construction of the shower door roller brass and Plastic. : Easy Glide replacement shower door roller Suitable for most shower enclosures, shower cabins and steam cabin housing Designed to fit 4-8 mm glass Material: brass and Plastic Package includes: 8x Shower Door Roller.