Features: Broad Model Compatibility: The RP50587 cartridge works with various single handle kitchen and bathroom faucets, including models 100, 101, 140, 141, 400, 440, 441, 470, 501, 520, 522, 978, 1353, 1903, 4140, 4153, 4353, 4453, 9178, 9678, 9978, 16968, 16970, 19888, 19950Z for quick replacement. Rigorous Testing Validation: This faucet cartridge undergoes extensive testing to maintain consistent function, fixing leaks, drips, stiff handles, and water pressure problems for extended use. Quick Installation Process: Minimal plumbing knowledge required, just follow simple steps to replace within minutes, efficiently fixing faucet issues while reducing service expenses. Strong Heat Resistant Construction: Built with sturdy plastic that resists wear and mineral buildup, ensuring smooth handle movement and stable function over time. Original Design Standards: Manufactured to meet initial specifications for proper alignment with faucets, fully restoring water control and temperature adjustment like factory parts. Specifications: Substance: plastic Product size: 3.78x3.48cm (particulars as shown) Model number: RP50587 gate center Package Includes: Gate center accessoriesx1 note: Before using the accessory, please check if it is compatible. Pay attention to the storage methods.