General description These double rollers are designed for shower doors, providing a smooth sliding experience. The set includes 4 rollers (2 for the top and 2 for the bottom) and is suitable for shower enclosures, stalls, and steam rooms. Technical specifications Roller diameter: 23mm Glass door thickness: 4-6mm Recommended glass hole size: 14mm Minimum glass hole size: 12mm Installation Easy to install and maintain. Usage Recommended to replace plastic shell rollers every six months. Recommended to replace metal shell pulleys every year.