5-In-1 Computer Cleaning Kit With Nylon Bristles, Flocking Sponge, High-Density Brush, Metal Pen Tip And Keycap Puller, Dual Head Hidden Design To Meet A Variety Of Cleaning Needs. Special Selection Of Nylon Brush With Moderate Softness And Hardness, Three-Row Design With High Pore Strength, Good Elasticity, Stiffness And Compactness, More Labor-Saving Friction.