Wickerham card, for turbidity adjustments to a McFarland standard

A 2 x 3 inch plastic laminated card with thick black and white lines to facilitate the preparation of bacterial and yeast suspensions when comparing the turbidity to a McFarland Standard. A handy visual aid to be used for the preparation of inocula for the disk diffusion and other tests that require a specified McFarland turbidity.

• Supplier: Amerigo Scientific
• Product #: Z08