Tube Holder Single Variable Flow, only Back Catalog number: 800072 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800062 Tube Holder Housing End, 1/2" for 6mm OD Price on request 800064 Tube Holder Housing End, 5/8", for 7-10mm Price on request 800165 Sorbent tube adapter nipple for Dual manifold High Price on request