The R400B10-412 Violet Spring by METROPAC is specifically designed for use with R400 and R400s models. This spring is engineered for durability and reliable performance in various applications. Its precise design ensures optimal functionality, making it an essential component for maintaining system efficiency. The violet color coding allows for easy identification and compatibility with specific models. Ideal for both professional repairs and routine maintenance, this spring enhances the longevity and performance of your equipment.