Professional Bore-Whips cleaning tool specifically designed for .177 caliber .17 caliber and 4.5mm bore firearms and air rifles..177 Cal/.17 Cal/4.5mm Bore-WhipsSKU: 42-0017-12-2UPC: 603266420171Precision-sized for .177/.17 caliber and 4.5mm bore diametersEffective bore cleaning and maintenance toolEssential cleaning accessory for maintaining accuracy and performance of small caliber firearms air rifles and precision shooting equipment.