Sorbent Tube, XAD-2, 8X110, 400/200, 50/BX Back Catalog number: 811-9975-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9963-50 Sorbent Tube, Microlite, 6X70, 200mg, 50/BX Price on request 800261 Single Tube Holder Kit, 7-10 x 175mm Price on request 800230 Triple Variable Tube Holder Kit, 6 x 70mm Price on request