Cotton Patches 2 1/2 " (Per 100) - Manufacture ID: 7037100% cotton these patches work with rifles shotguns or pistols. By offsetting their position on the jag centering them or doubling the patch thickness a variety of calibers and gauges can be accommodated with this one size. 2-1/2" diameter works well with .45 and .54 Black Powder and .375 and .45 Centerfire