Invincible Stack Packs are an ideal storage solution. Store everything from flies to sinkers! You should have several of these for your next fishing excursion so you can really clean and organize your tackle box before the trip! Tough transparent plastic; Perfect for storing flies, lures, hooks, sinkers and other small tackle; Size of Invincible 3066: 2"; Size of Invincible 3067: 2 1/2". Order ONLINE Today! State Size, as available in the Shopping Cart below. Invincible Stack Packs