It is designed to securely hold autosampler vials in place during centrifugation. This high-quality adapter is compatible with Eppendorf's FA-45-20-17 and FA-20x5 rotors, making it an essential accessory for laboratories that need to process autosampler vials efficiently and safely. The pack includes 4 adapters, providing a cost-effective solution for labs that handle multiple vials simultaneously. Made from durable materials, this adapter ensures reliable performance and safe sample processing in a variety of laboratory applications.