Material: lightweight and sturdy ABS PLASTIC. Pakage inclues 50 grommets. Inside Diameter: Approx. 41mm/1.6". Outside Diameter: Approx. 70mm/2.8". Fit for rods up to 1-1/2-inch diameter. Lightweight curtain grommet makes it smoothly slide on curtain rod and protect the rod with low noise. The diameter of the holes which is cutted on the fabric is 51mm/2". No tools needed for installing, snap together easily by pushing one half into the other. Great accessories for holding curtains and draperies. Widely use for DIY to decorate your curtain, drapery, fabric, etc. Note:These curtain grommets suitable for general thickness and weight curtain. Elevate your window dressing with our premium 1-9/16-Inch Inner Diameter Plastic Curtain Grommets, a 50-pack in sleek Black. Crafted from lightweight yet robust ABS plastic, these grommets ensure smooth sliding on your curtain rod while protecting it from noise and damage. With an inside diameter of approximately 41mm (1.6") and an outside diameter of about 70mm (2.8"), they fit rods up to 1-1/2 inches in diameter, making them versatile for various curtain types. No tools are required for installation; simply snap the halves together for an easy, secure fit. Ideal for both DIY projects and professional use, these grommets are a reliable choice for holding curtains and draperies, adding a touch of elegance to your space.