Features: - Easy to use. adjust the height and angle of the door. - These shower door rollers can be used in quadrants, curved showers or straight sliding doors. - The shower door roller is adjustable, easy to move. install and the shower door is smoother than before, no shaking or screaming- No need to fish in shacks and plumbers or buy new shower doors. - Kit includes 4 adjustable upper shower door rollers and 4 lower adjustable shower door rollers. - Delivered with a cap. screw. - The spring is also suitable for to curved shower doors. - Designed with nuts and plastic covers. Note: Please check the shower door glass hole size before purchase. Package: 4x top shower door rollers 4x bottom shower door rollers