Triple Variable Tube Holder Kit, 6 x 70mm Back Catalog number: 800230 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9979-50 Sorbent Tube, XAD-7, 6X110, 100/50, 50/BX Price on request 200112 Tube Holder Housing, 7-10 x 150mm, 5/8", L255 Price on request 800075 Tube Holder Quad Variable Flow, only Price on request