Tube Holder Adapter for 5/8" Ends Back Catalog number: 800138 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request 800258 Single Variable Flow Kit, 7 x 130mm [Dräger Long Term Tubes] Price on request 800073 Tube Holder Dual Variable Flow, only Price on request