Sorbent Tube, XAD-7, Tube A: specially cleaned, 8 x 110-mm size, 1 section, 175 mg sorbent, 20/40 mesh; Tubes B and C: 8 x 110-mm size, 1 section, 175 mg sorbent, 20/40 mesh, 20 Sets (226-97)

Sorbent Tube, XAD-7, Tube A: specially cleaned, 8 x 110-mm size, 1 section, 175 mg sorbent, 20/40 mesh; Tubes B and C: 8 x 110-mm size, 1 section, 175 mg sorbent, 20/40 mesh, 20 Sets (226-97)

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