Designed for the collection, transportation and storage of DNA from biological fluids. Indicator card changes from pink to white when sufficient sample has been transferred. The dye washes out during processing and does not inhibit analysis or sample stability. Integral cover sheet protects the sample. Each card is 1.5” x 3” with four one-inch diameter circles on a 1.5” x 1.5” matrix; each circle can hold 100 to 125 µl of sample. 100/pk.