1. Material: rubber 2. Applicable models: for Karcher SC2 / SC3 / SC4 / SC5 / CTK10 / CTK20 3. Part number: 2.884-312.0 4. By replacing worn or damaged fittings, you can keep the performance of the steam cleaner stable 5. Provides long-lasting sealing performance and abrasion resistance 6. Multi-functional compatibility with a wide range of models 7. Function: prevents steam blowback 8. Transparent case for easy storage