Tissue-Tek® Stainless-Steel Base Molds are designed for use with Tissue-Tek® Uni-Cassette® and Biopsy, Tissue-Tek® Processing/Embedding Cassettes, Tissue-Tek® Mesh Biopsy Cassettes and Tissue-Tek® Biopsy 6-Chamber Cassettes. The 5-mm deep Molds are made of stainless steel and are reusable. They have extended fins to prevent tipping and to provide a gripping surface for easy handling. The flat, metal bottom allows maximum heat/cold exchange to enhance embedding and releasing the paraffin block.