The cotton patches from pro-shot are made from 100 percent cotton flannel fabric for purposes of absorbing foreign matter and residue.Each 1.5 inch cotton patch is made with a high thread count to pick up all of the remaining residue, but not tamper with the barrel's rifling.Type: Cleaning PatchesSize: 6mm-30 CaliberQuantity: 300 Per PackBristle Type: CottonLength: 1.50"Material: CottonProtects: Against Rust Powder Residue, FingerprintsSuitable For: Firearms