Hornady Crimp-On Gas Checks – 1000/ct come in a wide variety of diameters, including 0.25, 0.32, 0.38, 0.44, 0.179, 0.243, 0.264, 0.284, 0.348, 0.338, 0.375, 0.416, and 0.475 inches, among others. For hunters and other shooters who do their own reloading, these gas checks are a popular choice due to their high quality and craftsmanship.