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 800263 Single Tube Holder Kit, 5 x 150mm [Kitagawa TWA Tu Price on request 800230 Triple Variable Tube Holder Kit, 6 x 70mm Price on request 200157 U-Tube replacement for P/N 800143 Price on request