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Feedback About Silicon O-rings 2014-02-14
If you Google "Silicon O-Ring sizes" or something like "o-ring asa chart" you'll find several good links for almost all major o-ring standardized sizes. This kit contains several of those, but the problem is their variance for sizing is far too much. Most good o-ring sources provide you Rubber O-Ring with variance in the 4th decimal range (.000x), which is good.These seem to vary by as much as .0x, which makes them useless for many replacement needs. Great if you're building something and make the size up as you go. These seem to be running "thinner" than they should be. For instance, some of them should have a cross-section (thickness) of 3/32" (0.0937) but seem to be more along the lines of .08 or less, which makes the entire o-ring the wrong size. Even when it's the right size, being too thin they won't seal as well or at all.
I have purchased o-rings in bulk from a major industrial supplier, easily found online, and their o-rings are spot-on. The ones in this kit are just kinda "meh".
*** HAVE FOUND 2 THINGS THEY DO FIT
I needed to replace burst o-rings on a high-pressure washer, and a few of the o-rings in this kit fit just right. I've also used them on a really, really old paintball marker. That's about it.
*** THE CASE WAS OK
They came in a pretty hardcore case, solid plastic. It'll last forever, but the hinge system occasionally hangs up. I don't use these for anything important but keep them around just in case. I have also used them to hold bundles of stuff together, almost like non-stretching rubber-bands.
*** SUMMARY
If you need accurate o-ring sizes, accurate replacement o-rings, your best bet would be to source them elsewhere. Certainly not this kit.