Tube Holder Adapter, 3/16" to 1/4" Ends Back Catalog number: 200187 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 143SA Xylene (5-1000 ppm) Gas detector tubes, pk/10 Price on request 800229 Tube holder plug for manifold Price on request 800249 Tube Holder Kit, Quad Variable (Includes 6x70mm, 7-10x110mm, 7-10x150mm, 7-10x175mm) Price on request