This Pack of 100 Curtain Blind Upholstery O Rings is ideal for curtain making, blind repairs, and upholstery projects. Crafted from brass with a 19mm diameter, these hollow rings provide strength while remaining lightweight. Suitable for residential and commercial use, they are perfect for replacing worn rings or creating custom window treatments. Widely used by upholsterers, curtain makers, and DIY enthusiasts, these rings ensure smooth movement and durability. Their classic brass finish blends well with traditional and modern fabrics alike. A practical bulk pack for workshops, home projects, and professional installations requiring reliable curtain hardware.