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 200115 Tube Holder Housing, 7 x 130mm, 5/8", L247 [Draege Price on request 800136-10 Tube Holder Collar Clip, for 5/8" OD, 1/2" ID Tubi Price on request F-PRO-1218 Universal Tube Holder System - Instruction Manual Price on request