【Shower Door Roller Pack】: You will get 8 shower door rollers (4 upper wheels and 4 lower wheels, the upper and lower wheels can swing left and right, and the lower wheels have springs , so the guide wheels are also suitable for curved showers. 【High quality material】: The shower door roller is made of ABS plastic and stainless steel.The connecting rod is made of reinforced aluminum alloy. , strong supporting force, can be used for a long time in a humid environment, rust-free, corrosion resistance, sturdy and durable, and long service life. 【Wear-resistant POM wheel】 : The roller of the shower door roller adopts POM wheel, the bearing shaft is smooth and smooth, quiet and wear-resistant, easy to operate, and will not produce unnecessary noise in your life. 【Easy Installation】: This shower door roller is very easy to install. s included a screw and a nut. You just need to line up the rollers with the glass mounting holes and use a screwdriver to tighten the screws. The included nut