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This inoculating needle has a metal handle with nichrome wire loop to transfer bacteria from a culture to a petri dish.
Sterilize the loop between transfers using a flame and heating the loop until it glows. Allow the loop to cool before inserting in the bacteria culture or the heat will kill the bacteria being transferred.
Assembly: The straight piece of wire inserts into the end of the handle, and the handle’s screw-tip loosens and tightens the wire inside the handle. You may find it best to insert the wire slightly off-center. Make sure the handle is fully tightened around the wire before use.