Etcher for Linux X86 (CentOS 7 32 bit)

I am a beginner for Linux but an old Windows user. I would like to create a bootable pendrive for booting CentOS 7 for a 32 bit PC. Can you advise me which Etcher version should I download and use for flashing a CentOS image to my pendrive (capacity 16 megabyte)? And how to use Etcher for this purpose?

László Nemes, Budapest