Pack options: available in 20 / 30 / 40 / 50piece sets. Each set is organized in rows for compact storage and easy portability — keep some at home and take others with you or share with friends. Durable construction: each brush uses a stainless steel core for strength and long life. The core resists bending or breaking during repeated use. Effective bristles: ultradense, wide nylon bristles reach into small pores and crevices to remove mineral buildup, debris, and blockages faster and more effectively than a cloth or sponge. Multifunction cleaning tool: designed for tight or hardtoreach openings — works on shower head nozzles, coffee machine outlets, car wash machine nozzles, keyholes, faucets, sinks, reusable straws, toilet flush nozzles, mobile phone ports, 3D printer nozzles, and other small holes. Ergonomic grip: hexagonal texture design and matte finish provide a stable, comfortable hold, even when wet. The shape makes it easy to apply controlled pressure in confined spaces. Why you need it: prevents reduced water flow and uneven spray by removing scale and debris from tiny nozzles; extends the life and performance of appliances and fixtures; saves time compared with soaking or disassembling parts. Use scenarios 1) At home: quickly clear mineral buildup from shower head nozzles to restore spray pattern without removing the fixture. 2) Coffee station maintenance: clean espresso group heads and steam wand tips to maintain consistent flow and beverage quality. 3) Electronics and precision equipment: remove dust and debris from phone ports, 3D printer nozzles, or small machine nozzles where larger tools cannot reach. Material and performance summary Core: stainless steel (durable, resistant to breakage) Bristles: ultradense, wide nylon (removes stubborn deposits in small openings) Handle: hexagonal textured, matte surface (secure grip, ergonomic control) What you get A practical set of 20/30/40/50 cleaners arranged for easy storage and sharing, suitable for regular maintenance of household fixtures, coffee equipment, automotive nozzles, and small technical components.