Features:1. These round curtain grommets are made of PP plastic with a frosting finish for a fine texture, beautiful appearance, firmness, and durability.2. It built-in nanoscale silencing ring, that can slide smoothly on the curtain rod, protect the curtain rod from low noise and less friction, better than ordinary metal curtain grommets.Application:This grommet is not only a replacement kit for curtains but also good for shower curtain rings, locker room door curtains rings, fabric rivets, backpack hole bag rings, DIY handicrafts, etc.Specification:Color: CoffeeMaterial: PP PlasticSurface Finish: FrostingInner Diameter: 40mm/ 1.57inchOuter Diameter:80mm/ 3.15inchTotal Thickness: 14mm/ 0.