Tube Holder Kit, Dual Variable Manifold (Includes Back Catalog number: 800251 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9966-50 Sorbent Tube, Silica Gel, 6X70, 100/50, 50/BX Price on request 800170 Tube Holder Hose Barb Fitting Price on request 200486 Tube Holder Tubing, 1/4" ID x 1/16" W (10 ft) Price on request