set is made from sturdy nylon and metal materials, making them and effective. These can effectively remove debris from the inner layers of a . Available in different sizes, allowing you to choose the excellent brush that fits size or to cleaning. Features -Color:Khaki -Material:Nylon, metal -Size:6.00X5.00X27.00cm/2.36X1.97X10.61in - Various size of cleaning make them easy to clean the bees bottles, bottles, test , flask, etc. - cleaner brush is great for cleaning small glassware and labware, which can gently and debris. - The nylon bristles are very easy to get the sides, bottom, and corners, can even the most difficult of inside crevices. - Nylon bristles cleaner is lightweight feature and clean small test tubes in a minimum of effort. - Metal handle cleaning brush is firm and sturdy to make the jobs easier, easy to grip and convenient to use. Package list: 2 small 2 middle 2 large 2 x flask bottles 2 x bottles