What is the suitable rollers used to curl synthetic hair extensions?

what rollers should be used? is it hot rollers, plastic rollers or others? thanks.What is the suitable rollers used to curl synthetic hair extensions?
Definetely not hot rollers it will melt the hair...use plastic rollers, the kind you use when your hair is dry. If you want to use a curling irron, put it on VERY low heat and dont leave it in the hair for too long.What is the suitable rollers used to curl synthetic hair extensions?
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