Remark: The type OTP 3-prong color coded, quick disconnect plugs and jacks provide reliable connection between thermocouples and extension wires. The color coded bodies are molded of high performance glass reinforced nylon. Tubular plug prongs and collet-type jack inserts have low mass and reduce temperature gradients. Negative prongs and inserts are larger than positives to insure proper polarity upon connection. This is a standard feature on all OMEGA connectors. Recommended for most applications requiring three wire circuits including shielded thermocouples, stand ambient temperatures to 218 deg C.High impact