Tube Holder Adapter for 1/2" Ends Back Catalog number: 800139 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9980-50 Sorbent Tube, XAD-7, 6X70, 60/30, 50/BX Price on request 800261 Single Tube Holder Kit, 7-10 x 175mm Price on request 800253 Single Variable Flow Kit, 6 x 70mm (Standard Charc Price on request