Tube Holder Kit, Dual Variable Manifold (Includes Back Catalog number: 800251 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9967-50 Sorbent Tube, Silica Gel, 8X110, 300/150, 50/BX Price on request 200112 Tube Holder Housing, 7-10 x 150mm, 5/8", L255 Price on request 800135-10 Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubi Price on request