Ox Yoke Originals top quality, pre-cut, muzzle loader shooting patches of 100% cotton fabric woven to strict uniform specifications. Dry, requires lubrication of grease or oil applied by shooter. .015" thick, bag of 100 patches. Available in four sizes. .30-.39 cal. No. 333151, .40-.49 cal. No. 334151, .50-.59 cal. No. 335151, .60-.69 cal. No. 336151.