A systemic gram negative ring device suited towards Gram Negative organisms carrying 8 antibiotic impregnated tips allowing the simultaneous application of the equivalent individual anti-microbal 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 Size - Pack of 100 Mast Rings

Antibiotics include:

• Ampicillin 10µg
• Cephalothin 5µg
• Colistin Sulphate 25µg
• Gentamicin 10µg
• Streptomycin 10µg
• Sulphatriad 200µg
• Tetracycline 25µg
• Cortrimoxazole 25µg