Tube Holder Quad Variable Flow, only Back Catalog number: 800075 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9989-20 Sorbent Tube, Beaded Carbon, 6X70, 140/70, 20/BX Price on request 800064 Tube Holder Housing End, 5/8", for 7-10mm Price on request 200115 Tube Holder Housing, 7 x 130mm, 5/8", L247 [Draege Price on request