Description: Size: about 13mm long, hole: 3.8mm, pin: 1.8mm. Quantity: about 20 pieces in total. Material: made of copper, good workmanship that the surface is smooth and the color is not easy to fade, wear comfortably and look attractive. Each Cap Pearl Pendant Connector with a oval eye opening at the top, so you can slide in a string for a beautifully luxurious new necklace or bracelet. Cup pearl screw eyes into the holes of partially drilled items to make secure pendants, earrings, or dangles. You may fascinated by these versatile and attractive cup pearl screws. Typically used for half drilled beads but would also work great for your wood, polymer clay designs and corks like those in tiny glass bottles. Specification: Material: Copper Color: Silver Size Chart: Pin Size: Approx. 1.8 mm / 0.07 inch Hole Size: Approx. 3.8 mm / 0.15 inch Length Size: Approx. 13 mm / 0.51 inch Package Includes: 10 Pieces Cap Pearl Pendant Connectors Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the item's color may be slightly different from the pictures. Please understand