Tube holder plug for manifold Back Catalog number: 800229 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800072 Tube Holder Single Variable Flow, only Price on request 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request 171SC Formaldehyde 0.05-4.0 ppm Gas Detector Tube, pk/10 Price on request