The black curtain ring is made from heavy duty material and it is a perfect drapery ring. The 1.5-inch curtain rings with eyelets are very easy to installation. This 1.5-inch window hardware clip ring is compatible with up to 1.25" drapery rod. Package included: 10 PCS Oil rubbed curtain rings Specification and Dimensions: Inside Dimension: 1.5 inch Outside Dimension: 1.8 inch Weight of each drapery ring: 0.48 oz Installation step: Step 1: Put the 1.5-inch metal curtain rings to the window curtain rods. Step 2: Hanging the curtain to the 1.5-inch metal curtain eyelets. Notice: Please be careful when you are hanging the curtain. Please be notice this 1.5-inch curtain rings are compatible with up to 1.25" drapery rod. Please allow for the measurement issues of size and weight. Customer Service: If you have any queries of the drape rings, please don't hesitate to contact me.