Shotgun bore mop made with 100% cotton and a brass core.They are made of the highest quality construction possible.Mops can be used for quick cleaning and are especially excellent when using oil for bore lubrication because they create a foaming action that helps in the lubrication process.Thread Pattern: #5/16-27Type: Wool MopSize: 20/28 GaQuantity: 1Bristle Type: CottonLength: 1.75"Material: CottonTip Feature: N/AProtects: Against Rust Powder Residue FingerprintsSuitable For: ShotgunsEco-friendly: Yes