PSA/GCB(石墨碳黑)净化管，15 ml, 1.2 g MgSO 4, 400 mg PSA, 400 mg GCB, 50支/盒

PSA/GCB cleanup tube, 15 ml, 1.2 g MgSO4, 400 mg PSA, 400 mg GCB, 50 pcs/pack