How to save a sliced sprite as a PNG?

I have sliced a sprite image but want to save the individual slices because next time I might need just one of those sliced parts in another game. There’s no save/copy option on them, and going to the game directory has a file which is png.meta type.
Sorry, my images are not working properly here, providing link:
image_SpritesInUnity

image_FileInDirectory

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Open the image in an image editor like photoshop, gimp, etc. Use the selection tool to copy your sliced sections and create new images the size of your sliced sprites. Paste your sliced sprite and save as PDF