The 108/109 High Series Connector is a thermocouple connector specialized for applications of high temperature. The fastenings are not only anti-rust, but they are also non-magnetic and stainless steel. To conform to ANSI recommendations the colors are for specific calibrations for positive contact. The color will not fade because it is permanent even with exposure to temperatures of up to 1000 degrees Fahrenheit or 538 degrees Celsius. In all calibrations excluding those used with Platinum vs Platinum Rhodium thermocouples, is supplied in the connector are machined from matched thermocouple alloys. The connectors that are Platinum vs Platinum Rhodium are furnished with copper.