Accommodates any Two Combination of Sheath Diameter from .062″ to .250″ Connector Bodies are Type 303/304 Stainless Steel Polarized Connector Contains Matched Thermocouple Alloy Contacts to Insure Accuracy Assembly is Rated 225°F (107°C) Service A waterproof quick-disconnect connector, designed for mineral oxide insulated, metallic-sheathed thermocouples and extension leads. This assembly is identical to the 106 Series illustrated above, except that it has a compression-type fitting instead of the flexible hose-protected lead and end fitting instead of the flexible hose-protected lead and end fitting. This connector allows you to connect metallic-sheathed thermocouples or leads of the same or varying diameters by selecting compression fitting sizes.