Stainless steel balls are the heaviest fill available for the Tempest cap, weighing in at 5.6 g, against 4.1 g for the standard zirconia. Each set contains around 50 pieces at 3 mm.

All that mass takes longer to warm through, roughly 38 to 43 seconds at 80 W on an induction heater, and it holds heat far longer once it reaches temperature. The payoff is a long, gradual extraction with a smooth climb, which suits unhurried sessions.

The heaviest fill of the range puts stainless steel balls at the patient end of the spectrum: they take longer to warm, then hold their heat through draw after draw. If you like a session that keeps performing after the cap comes off the heater, this is the material for it.

Intended for use with: Tempest 2.