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Pure white cotton balls are made from highly-absorbent 100% bleached cotton. Soft, compact and uniform in size and weight, they will not come apart when saturated.
This buds head is made of 100% pure high quality cotton. They are often used to take microbiological cultures. They are swabbed onto or into the infected area, then wiped across the culture medium, such as an agar plate, where any bacteria from the swab will grow.