Spare tube assembly, ACTI-VOC Back Catalog number: SERZ-1097 Manufacturer: MARKES INTERNATIONAL LIMITED Availability: In the manufacturer's stock Price on request - + Recommended M-TSTIN Inserts, PTFE,pk 6 Price on request SERZ-1076 Spare filter assembly, ACTI-VOC Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request