Tube Holder Triple Variable Flow, only Back Catalog number: 800074 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9988-10 Sorbent Tube, Chromosorb-106, 10X150, 600/300, 10/ Price on request 800071-10 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request 400253 Tube Holder, Clear Storage Box Price on request