Tube Holder Kit, Dual Variable Manifold (Includes Back Catalog number: 800251 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9979-50 Sorbent Tube, XAD-7, 6X110, 100/50, 50/BX Price on request 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of Price on request 800259 Single Tube Holder Kit, 7-10 x 110mm Price on request