Pranski 12 pieces, -30 °C (-22 °F) to 200 °C (392 °F)

Less than the hot one, but it is the only one on this shelf and it tells you something. Silicone stiffens as it cools. It does not become brittle at domestic temperatures the way some plastics do, but a spatula at -20 °C (-4 °F) is a noticeably firmer tool than the same one warm — which is the condition it is in when you scrape a tub of ice cream, lever at a frozen block of stock, or take it out of an unheated drawer in January. Pranski publishes "-22°F/-30°C to 392°F/200°C"; the other six sets here publish only an upper figure. A specified lower limit means the compound was tested for it rather than assumed, which on a set bought for a freezer as much as a pan is worth having.

For how a utensil is actually used, no; for how people leave them, maybe. All seven listings on this shelf publish a figure and this is the lowest: 392 °F (200 °C) against 446 °F on three sets, 480 °F on HENKELIVING and a claimed 600 °F on NileHome. The thing is that a spatula is in the heat for seconds — you stir, you turn, you lift it out — and 200 °C (392 °F) is far above the temperature of anything you would be stirring. Where the rating bites is the habit of leaving a utensil resting in the pan while you do something else, which on an empty hot dry pan can exceed 200 °C (392 °F) easily. If that is how you cook, buy from the 446 °F group. If not, this is adequate.

Some of them, and this listing does not say otherwise. Four of the seven sets here state a stainless steel core — Umite Chef’s "one-piece stainless steel core... to keep the spatulas from bending", oannao’s "reinforced stainless steel core", AOTHOD’s steel reinforcement so they "never warp", and BESTZMWK’s published grade, "top-grade 304 stainless steel". Pranski states none, and claims instead that the tools are "strong enough to be turned and scratched with a spatula, but soft enough to not scratch your pan". For a whisk, a brush and the spatulas, flexibility is the point. For the slotted turner carrying a fried egg or a fish fillet, a coreless blade flexes and the food folds. That is the compromise at $1.42 a piece.