Tube Holder O-Ring Kit Back Catalog number: 800238 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800232 Tube Holder Kit, Deluxe (Single, Dual, Triple & Qu Price on request 811-9974-50 Sorbent Tube, XAD-2, 8X110, 150/75, 50/BX Price on request 800064-10 Tube Holder Housing End, 5/8", for 7-10mm (Packg o Price on request