Long Post Grommets 10 Pack by Tandy Leather International Save Liquid error (product-badge line 42): -Infinity% $2.59 SKU 1285-31 Solid Brass - $2.59 Nickel Plated Brass - $2.59 Color: Solid Brass 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 1/4" (6 mm) post length. Perfect for thicker materials. 5/16" (8 mm) inside diameter. Use Grommet Setter and Anvil #8097-03.