Primacell* Mouse Breast FibrOut* kit^ Kit, Primacell* Mouse Breast FibrOut* : Fibroblast Inhibitory System (for 500 ml medium), A mixture of cis-OH-proline, ricin toxin, gentamycin and formulated serum substitutes, Stability: package should be stored at 4-8 degree C, and effective up to 4 months