Innovative Grade US Origin Mouse Balb C Heart - Innovative Grade US Origin Mouse Balb C Heart from Innovative Research is collected on a custom basis from type Balb C mice located in the United States. The animals used for this are of US Origin, ensuring that only the highest-quality material is provided. This can be frozen immediately after collection, of kept fresh and refrigerated. If you have a preference, please mention at time of ordering. If no preference is indicated, this will ship frozen.