General description Our kit includes 8 shower door rollers (4 upper and 4 lower twin rollers); each roller measures 25 mm in diameter and is designed to fit windows with a thickness of 4 to 6 mm, weighing between 42 to 45 grams. These rollers are perfect for replacing old or worn-out shower door rollers, ensuring smooth operation. Technical specifications Roller diameter: 25 mm Weight: 42 to 45 grams Window thickness compatibility: 4 to 6 mm Other information Material: Solid zinc alloy with durable chrome coating Wheel material: Durable plastic Corrosion and rust resistant Quick and easy installation with spring-loaded button for bottom rollers