Unbranded Ceramic Thermowell 6685362011, 13492, 21-1/8" end to end (overall) length, ceramic well OD is 7/8", ID is 5/8", Label is marked 6685362011, 13492 Thermowell See DRW CLS Tab Note Button AX= 03-02-12-16. Threaded connection is 1" MNPT. Not sure of part number am using number from packaging label as part number. Please purchase accordingly.