Calibration Standard Mix 4 Back Catalog number: 53013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673016 Progesterone, 250mg Price on request 685273 Triflumizole, 100 µg/ml, Cyclohexane, 5ml Price on request 675863 Etoxazole, 10.0 µg/ml, Ethyl acetate, 10ml Price on request