Tube Holder Adapter for 1/2" Ends Back Catalog number: 800139 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 801935 Charcoal Tube, Coconut Shell, Standard, 50/100mg, Price on request 800138 Tube Holder Adapter for 5/8" Ends Price on request 800066 Tube Holder Collar Clip, for 1/4" OD, 1/8" ID Tubi Price on request