Tube Holder Kit, Quad Variable (Includes 6x70mm, 7 Back Catalog number: 800249 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request 811-9982-50 Sorbent Tube, Porapak-P, 6X110, 100/50, 50/BX Price on request 811-9966-50 Sorbent Tube, Silica Gel, 6X70, 100/50, 50/BX Price on request