Sunnyside BrandsBaseball Bump Cap Insert - Lightweight Head Protection - White (one Size fits Most)

I'm confused on how many come in the pack is it 1 for $10.00 and 3 for $18 or is it 3 for $10.00 and 9 for $18? it says pack of 3 in the picture.

Is this osha aproved6approved?

Would this fit inside a baseball cap size 6 7/8?

Does this qualify for PPE rating ??