Tube Holder Quad Variable Flow, only Back Catalog number: 800075 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9983-50 Sorbent Tube, Porapak-Q 6X110, 150/75, 50/BX Price on request 811-9989-20 Sorbent Tube, Beaded Carbon, 6X70, 140/70, 20/BX Price on request 800497-1 Tube Breaker Kit, Blue, LFS-113 Price on request