A systemic gram positive ring device, suited towards Gram Positive organisms, carrying 8 antibiotic impregnated tips allowing the simultaneous application of the equivalent individual antimicrobial susceptibility test discs. A paper ring, 65mm in diameter, with eight projecting arms. Each arm is impregnated with a different antibiotic identified using a letter from the key. Pack of 10 Mast Rings. Antibiotics include:. Chloramphenicol - 25µg. Erythromycin - 5µg. Fusidic Acid - 10µg. Oxacillin - 10µg. Novobiocin - 5µg. Penicillin G - 1 unit. Streptomycin - 10µg. Tetracycline - 25µg. Also available as a pack of 10 Mast Rings (B8A18715).
