Tube Holder Housing End, 1/2" for 5mm OD Back Catalog number: 800063 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9965-50 Sorbent Tube, Silica Gel, 6X70, 150/75, 50/BX Price on request 800064 Tube Holder Housing End, 5/8", for 7-10mm Price on request 200131 Impinger Holder, Double, Aluminum, GilAir/HFS Price on request