PrimaCell* 1 Rat Intestine FibrOut* 1 Kit^ Kit PrimaCell* 1 Rat Intestine FibrOut* 1, Fibroblast Inhibitory System (for 500 ml medium), mixture of cis-OH-proline, ricin toxin, gentamycin and formulated serum substitutes, stable at 4-8 degreeC, effective up to 4