Shower Door RollersSet of 4 shower door rollers. 23mm diameter bathroom DIY spare parts (2 upper rollers and 2 lower rollers), each wheel comes with a bumper and a stainless steel screw. Experience Material of sliding door rollers: High Quality Nylon Wheel + Copper Core Shaft, Low noise, elegant performance and rolling smoothly, Suitable for 4-6 mm glass thickness. Exact sizeInstallation kit shower door Roller diameter 23 mm. Wheel thickness: 5mm, shower door thickness: 4-6mm, glass mounting hole: 12-14mm. Easy to useReplacement shower door roller easy to slide, easy to install and use, with these sliding door pulleys, the shower door will glide like butter. Super FunctionShower door rollers suitable for most bathroom stalls. shower, shower cabins and steam cabins.