Key specifications Inner diameter: 40 mm Outer diameter: 60 mm Material: solid, hard wood with stable color and durability Why this product helps Strong loadbearing design supports medium to heavy curtains without bending or deforming. Durable wood resists color change and maintains appearance over time, reducing the need for replacements. Smooth, polished surface is burr for snag curtain fabric and comfortable handling. Function and performance Precisionsized inner diameter (40 mm) fits curtain rods up to 40 mm in diameter for reliable, secure mounting. Evenly finished exterior (60 mm outer diameter) provides consistent spacing and a neat visual profile on the rod. Multiple rounds of grinding and polishing ensure low friction for easy, quiet sliding. Easy installation Install quickly: slide each ring onto the curtain rod, hook the curtain into the ring's small attachment points, then slide curtains into place. No special tools or hardware required; suitable for DIY installation and fast replacement. Practical use scenarios Living room or bedroom: Ideal for dailyuse curtains where smooth operation and a stable finish matter. Hotel or rental properties: Durable, lowmaintenance rings that withstand frequent handling while keeping curtains neat. Heavy drapery or blackout curtains: Strong wooden construction provides reliable support for heavier fabrics. What makes it stand out Combines a robust, hard wood core with precision polishing to deliver longevity, smooth operation, and protection for curtain fabric. Simple, tool installation and a standard inner diameter make these rings compatible with most common curtain rods. Compatible with standard curtain setups that accept 40 mm innerdiameter rings; choose these rings when you want durable, smoothsliding performance and a clean finished look.