Polyoxymethylene embedding cassettes, also known as POM embedding cassettes, are specialized tools used in histology laboratories for tissue processing and embedding. These cassettes are commonly made of polyoxymethylene, a strong and durable thermoplastic material also known as acetal or Delrin.The use of polyoxymethylene ensures that the cassettes can withstand the harsh chemicals and temperatures involved in tissue processing without deforming or reacting with the reagents.