Medical-grade and FDA-compliant seals are elastomeric or plastic components specifically formulated, manufactured, and tested to ensure zero toxicity, zero leachables, and full biocompatibility in contact with pharmaceuticals, bodily fluids, or human tissue. They must meet FDA 21 CFR 177.2600, USP Class VI, ISO 10993, and often 3-A Sanitary Standards https://globalsealstech.com/medical/