EnVision FLEX, High pH is a high-sensitivity visualization system intended for use in immunohistochemistry together with Autostainer Link instruments. The dual link system detects primary mouse and rabbit antibodies and the reaction is visualized by DAB+ Chromogen. The kit includes Peroxidase-Blocking Reagent, EnVision/HRP, DAB+ Chromogen, Substrate Buffer, Target Retrieval Solution, High pH (50x Tris/EDTA buffer, pH 9), and Wash Buffer (20x). EnVision FLEX kits are compatible with EnVision FLEX and FLEX+ single reagents for Autostainer Link instruments.