Tube Holder Adapter, 3/16" to 1/4" Ends Back Catalog number: 200187 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800071 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request 811-9976-20 Sorbent Tube, XAD-2, 6X110, 150/75, 20/BX Price on request 800165 Sorbent tube adapter nipple for Dual manifold High Price on request