Sorbent Tube, Florisil, 6X70, 100/50, 50/BX Back Catalog number: 811-9985-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9977-20 Sorbent Tube, XAD-2, 6X110, 120/60, 20/BX Price on request 200157 U-Tube replacement for P/N 800143 Price on request 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request