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 811-9989-20 Sorbent Tube, Beaded Carbon, 6X70, 140/70, 20/BX Price on request 200157 U-Tube replacement for P/N 800143 Price on request 200102 Tube Holder Housing, 6x70mm, 1/2" OD, S225 Price on request