Easy to assemble and able to run up to four SDS-PAGE mini-gels simultaneously, the Mini-PROTEAN® Tetra electrophoresis system offers leak-free hand casting and can run either hand-cast or precast gels. Interchangeable module design allows the tank to be used for protein transfer with a mini trans-blot module. To enable error-free operation, the Tetra cell lid ensures correct electrode polarity and eliminates leakage issues. Guidelines on the tank indicate how much buffer to add for two-gel and four-gel electrophoresis.