I got this diamond paste from a dealer out of the Ukraine and I got some 4 Carat Concentration stuff the first time I ordered from him and this time I got some 10 Carat diamond paste's to try out. Going from the bottom up the Micron's are 3,1,.5,.10,the .10 is just 4 Carat in another brand because this guy does not make .10 The bottom 2 strops are Ash wood strops and they got that dark in about 30 seconds way faster then any other diamond paste has made a brand new strop of mine get that dark that fast,I have other Ash strops where I have used them a many times and they never got that dark. I found this diamond paste to do a great job as far as speed and polishing my Hinderer XM-18 S35VN blade,I would take pictures but my camera does not focus on the edge very well. Here are picture's of the strop's and also a chart of the different grit's he sell's and what the diamond concentration is,the coarser the grit the more diamonds there will.The are 3 concentration's you can get 3 different concentrations Normal Heightened and High. The finer the grit the lesser the carat weight will be and the coarser the grit the more the carat weight will be. To understand what Micron your getting when you look at the chart and we'll use 3/2 as an example,the first witch is 3 means it's a 3 Micron diamond paste and the 2 means that a very very small percentage of the diamonds will be 2 microns and no smaller the 2 either. I'm also putting a grit chart in this post as well that convert's Microns to grit. The sellers email is [email protected] if you want to find out more and the cost is about 23 to 36 bucks per container for the 10 and 20 carat stuff in the finer grit's depending on the Micron you want,he has water and oil base I have tried both and liked the both. I was not given this stuff to review and did not get any money to post this I paid for everything out of my own pocket.