Shower Door Twin Rollers Runners , Set of 4 , Top & Bottom , 8, 10mm , 23mm 2Top & 2 Bottom

4 rollers for shower doors. Install 4-6mm thickness shower glass door. 8mm thickness shower glass door cannot be used. Glass hole diameter can be 8-10MM Wheel thickness: 6mm. Diameter: 23mm. Material: Metal, zinc alloy (figure 7 is the bottom wheel). Package includes 4 shower door rollers: 2 upper rollers and 2 lower rollers (2 bottom rollers include 2 springs + 2 screws).