Tube Holder Quad Variable Flow, only Back Catalog number: 800075 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 200104 Tube Holder Housing, 5 x 150mm, 1/2", S255 [Kitaga Price on request 800251 Tube Holder Kit, Dual Variable Manifold (Includes Price on request 811-9985-50 Sorbent Tube, Florisil, 6X70, 100/50, 50/BX Price on request