Tube Holder Quad Variable Flow, only Back Catalog number: 800075 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9963-50 Sorbent Tube, Microlite, 6X70, 200mg, 50/BX Price on request 800229 Tube holder plug for manifold Price on request 200102 Tube Holder Housing, 6x70mm, 1/2" OD, S225 Price on request