I bought a set of NPR rings on eBay and the listing said they are for D16 engines but the vehicle compatibility said they are pretty much compatible with most D series. Anyways, when I bough my set of pistons and rods they came with NPR rings and on the box it says "Fit for PM6(D16A) 0.50"

On the box I just got it says "Fit for PM5(D15B) 0.50".

Are they compatible? These rings look a little different. Instead of being silver they are black. Other than that they look pretty much the same in size.