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Maximize Heat Transfer
The unique split-sheath design of the Watt-Flex Cartridge Heater allows the independent, bilateral expansion of each half of the heater outward against the walls of the surrounding bore.

Ideal for Use in Oversized Bores
The unique bi-lateral expansion of the cartridge heaters eliminates the need for tight fits and makes them well-suited for use in oversized bores where conventional cartridge heaters cannot be used effectively.

Heaters Eliminate Bore Seizure
The split-sheath design cartridge heater reduces your heater change-out costs by preventing heater bore seizure.