Tube Holder Kit, Quad Variable, 6 x 70mm Back Catalog number: 800231 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800072 Tube Holder Single Variable Flow, only Price on request 811-9967-50 Sorbent Tube, Silica Gel, 8X110, 300/150, 50/BX Price on request 800063-10 Tube Holder Housing End, 1/2" for 5mm OD (Packg of Price on request