I snapped a quick picture of one of the SR cards not already shown above. Just a cell phone shot, I don't have time to do better, sorry!
As the post above alluded to, the info about HR vs SHR here needs some correction. This set has 19 of the HR lenticular cards, and 6 SHR lenticular cards. The SHR cards are much, much more rare than the HR cards. You get one HR card per pack, unless it has an SHR card instead (it won't.)
How rare are they? Dunno, info on these is really sparse online. Anecdotally, between all of Kayou's TF series so far I've gone through ~20 boxes + the Constructicon series 2 promo set things and have gotten 1 SHR the entire time. That's, very roughly, 1/1900 cards or again very roughly, 1 SHR and ~375 HR cards over all those packs.
As I said in the other thread where these came up, I don't recommend trying to go 100% complete on these sets. Generally speaking, hit up the R, SR, HR, SSR and maybe the UR (some series seem to have better luck there than others) subsets and call it a day. Add on stuff like the TF One set's Thirteen if you really dig em. Don't bother with SHR or SE stuff unless you hate yourself and/or are rich.