Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Back Catalog number: 811-9981-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800258 Single Variable Flow Kit, 7 x 130mm [Dräger Long Price on request 800073 Tube Holder Dual Variable Flow, only Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request