Description: 【Efficient Cleaning】Integrated dust removal brush automatically sweeps away dirts from curtain belts or straps with every movement, prevent buildup, jamming, noise, and wear, no manual maintenance required 【Quiet Operations】Built in silent roller system transforms sliding into rolling for smooth and quiet performance, making it ideal for bedrooms, studies, and other peaceful spaces 【Material】Crafted from high strength PP; features nice resistance, temperature tolerance, and anti aging properties for long term indoor or outdoor use 【Easy Installation】Precision fits standard roller blind belts/straps up to 23mm wide; quick replacement of old or damaged guides with snap on or screw, fixed design 【Versatile Use】Functions as both an exposed guide rail or a concealed component inside curtain head boxes; ideal for installations or upgrading existing systems Specification: Material: PP   Size Chart: 6cmx2.3cm/2.36inchx0.91inch Package Includes:8 Belt Guide Roller Shutter Note: Please allow slightly errors 1-2cm differences due to manual measurement.