Is DermaRoller Micro-needling Safe with Medical PVC Plastic Needles?

I came across the "Mi-Roll" derma roller, which is made of Medical PVC Plastic Material Microneedles (as opposed to stainless steel needles). The manufacturer writes that the mi-roller is type I FDA and KFDA approved.

Do plastic needles work the same as stainless steel needles? Are they just as safe/sanitary?

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