SIERRA MARINE 18-5898 Temperature Sender - 1/2"-14 NPT subcategory-ppe-and-safety-gear The gauge uses a standard

The gauge uses a standard 2" opening and includes required spade type insulated terminals

JOHNSEN'S 6315 R134A FREON R134a Car Air Conditioner Refrigerant 12oz CAN  (Not for use in California)

maximize current transfer

and when those run out you can use any brand of utility knife blades (thicker heavy duty style blades are recommended)

Compatible with 2

SIERRA MARINE 18-5898 Temperature Sender - 1/2"-14 NPT subcategory-ppe-and-safety-gear The gauge uses a standardFEATURES Sierra Temperature Sender Range: 240 DS Thread Size: 1 2 inch or 12. 7mm 14 NPT Terminal Type: 10 32 stud DESCRIPTION The Sierra 18 5898 Temperature Sender features a 1 2" 14 NPT thread, 10 32 stud terminal type and 240 DS range. Each Sierra product meets or exceeds the original equipment part it replaces. Designed to be interchangeable with Crusader 700427, Mallory 9 42401, Medallion A 2618 4, Mercruiser Stern Drive 34625, 97258, 97258A1,