Dimensions 7" x 2.33" x 1.22". Packaging says "Made in China" and looks like NUZAMAS - it is only one seller with no markings identifying maker.. Grain density is even, edges are beveled cleanly, glue between stones is very clean, both sides cut well and cleanly, I cannot confirm the grit rating given but seems suitable for my purposes its something like silicone rubber that stretches on the rock but isn't wet stable (like other brands) with a 1/4" strip that touches the post. My only concern is that the 5000 grit is soft and wears out quickly, but it's still too early to tell otherwise it's looking good for the money.