Tube Holder O-Ring Kit Back Catalog number: 800238 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 200486 Tube Holder Tubing, 1/4" ID x 1/16" W (10 ft) Price on request 811-9979-50 Sorbent Tube, XAD-7, 6X110, 100/50, 50/BX Price on request 800073 Tube Holder Dual Variable Flow, only Price on request