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 811-9902-50 Charcoal Tube, Coconut Shell, Large, 200/400mg, 8x Price on request 800259 Single Tube Holder Kit, 7-10 x 110mm Price on request 800681-1 Tube Breaker Kit, Black, LFS-113 Price on request