The KleenBore Black Nylon Bore Brush is designed specifically for .40 cal., .41 cal., and 10mm guns. Made from durable nylon material, this brush is perfect for keeping your firearm clean and maintained. The black and silver color scheme adds a sleek and professional look to your cleaning supplies. This set includes one black nylon bore brush, making it a convenient and effective tool for any gun enthusiast or hunter looking to keep their rifle in top condition. Made in China, this brush is a reliable and efficient option for gun cleaning and maintenance.