Charcoal Sorbent Tubes / single layer / 24 pcs,・ A single layer of washed activated charcoal (sorbent) is enclosed in a glass tube. (200 mg of 20-40 mesh activated charcoal)

・ It is used in the same way as the standard model, and is convenient when the backup second layer of activated charcoal is not necessary.

・ The glass tube has been pre-scored to make it easier to cut.,

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