35mm Antique Silver Long Leather Setting Slider for 5mm Flat Leather. Channel 30mm x 5mm. Hole size: 5mm x 2.5mm. You can glue leather into this slider for a pop of added color. This is perfect for using up short pieces of leftover leather! Pro tip: If you are using black-edged leather, try finishing the cut ends of your leather piece with a black marker for a more cohesive look. Zinc plated with 99.9% sterling silver. Free of lead, nickel, cadmium. Hypoallergenic.