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+ltc is right, K denotes the series, the digits thereafter is the compound and whatever after is just gibberish.
K - Series; 05 - improved resin compound; Ti - Titanium backing plate (S for steel, A for alu), rx - Road/Cross
I might be wrong but I believe the number at the end just refers to the iteration of the compound, rather than the shape of the pad so you should be fine either way.