The Brownells bore plug is constructed from high-quality rubber, offering durability and a secure fit within the bore to prevent the ingress of moisture, dust and debris during storage or maintenance. The bore plugs are compatible with a wide range of rifle and pistol calibers, making them a versatile addition to any firearm maintenance toolkit. The rubber material is resistant to common cleaning solvents and oils, ensuring longevity and reliability. The ergonomic design facilitates easy insertion and removal, minimizing the risk of damage to the bore or surrounding components. This product is ideal for firearm enthusiasts, gunsmiths and professionals seeking to maintain the integrity and performance of their firearms. The Brownells RUBBER rifle/PISTOL BORE PLUG is an essential tool for preserving the condition of your firearms, ensuring they remain in optimal working order.