Designed for use with al. industrial thermometers to creat. sealed system. Allows the easy replacement of thermometers without the need to shut down or drain the system. CAN/CGSB-14.4-M88 Compliant. CRN registered. 1 Year warranty. Applications: HVAC, pipes, chill water and hot water lines. Material: brass. Bore diameter: 7/16" tapered. Thermometer connection: 1-1/4" UNF. Process connection: 3/4" NPT male standard. Stem length: 3-1/2". Overall length: 4-1/4". Insertion length: 2-1/2". Connection: 3/4" NPT male. RoHS compliant.