500ml 304ss Sampling Glass Bottles Holder Cage for Food Oil. Food Grade 304 Stainless Steel: Made of 304 stainless steel, ensuring no pollution to oil samples during manual sampling. Prevents Sample Volatilization: Designed to avoid transferring samples to intermediate containers, preventing volatilization during testing. Safety Lock Mechanism: Equipped with a safety lock to prevent glass sampling bottles from dropping out during use. Easy to Clean and Operate: Simple operation design with easy cleaning features for efficient daily use. Compliant with International Standards: Conforms to ASTM D4057, ISO 3170, and GB/T 4756 standards for petroleum product sampling. Customizable OEM/ODM Service: Supports OEM and ODM services for customized product requirements.