Hi , problem I got is company I bought markers from doesn't sell specific orings for my kaos d, just a universal oring kit which might get you out of of a bind! LOL does any one out there know if its possible to tell durometre of orings? I got 2 full sets plus extra of orings more likely to wear out quicker from azodin Taiwan. From price list I got can tell which one,s made from more expensive materials. I,m thinkin of taking orings i got to a large stockist of orings to match them up but do,nt know if it,s possible to tell durometre. I know generally speaking 70 is usually used but not always.