4X Double Wheels Shower Door Top& Bottom Rollers Wheel Runners AU Set: 2 door top rollers and 2 door bottom rollers Materials: Plastic, metal Total size: 39*25mm Wheel diameter: 23mm Wheel thickness: 5.4mm Pitch: 26mm Suitable hole size in the glass: 9-12mm Suitable for glass thickness 4-6mm Swivel action to also fit curved and quadrant showers They are adjustable up and down to allow the door to be lined up to mate with the frame or magnetic seal Package including : 4x Shower Door Rollers (2 top and 2 bottom rollers) Note: Size may be 1-5mm inaccuracy due to hand measure. Please ensure this Shower Door Rollers will fit your shower door before purchase!