Material : Durable Stainless Steel And Stiff Nylon Bristles For Optimal Cleaning Flexible Straw Cleaner : Agility In Tight And Constricted Areas Reusable & Durable : Built To Withstand Frequent Use Hard-to-Reach Spaces Cleaning : Expertly Designed For Difficult Spots Widely Applicable : A Comprehensive Solution For Broad Cleaning Applications Transform your cleaning efficiency with our Tube Scrubbing Solution. This set of multi-diameter brushes boasts a rustproof design, ensuring they remain in top condition even after extensive use. The stiff nylon bristles provide effective scrubbing power, while the flexibility of the straw cleaner allows for deep cleaning in the smallest spaces. Whether for home or office, these brushes offer unparalleled versatility and convenience.