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 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of Price on request 800232 Tube Holder Kit, Deluxe (Single, Dual, Triple & Qu Price on request 800253 Single Variable Flow Kit, 6 x 70mm (Standard Charc Price on request