O‑Ring W&P / Clean Room Class 5 is part of the FlexClean™ precision cleanliness portfolio, offering elastomer seals that are washed and packed in an ISO 14644‑1 Class 5 cleanroom. The result is a high-purity elastomer seal that combines exacting material performance with cleanliness essential to advanced surface treatment processes. This is a Custom Article Number with a Customer Specific Design.