Tube Holder O-Ring Kit Back Catalog number: 800238 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9984-50 Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Price on request 800165-10 Sorbent tube adapter nipple for Dual manifold High Price on request 200113-10 Tube Holder Housing, 7-10 x 110mm, 5/8", L240 (Pac Price on request