Sure.

This is a 36"x48", 6" thick tool grade B black granite surface plate made by Precision Granite Co, Whittier California. I purchased it directly from Precision Granite. They also manufactured a custom 48"x24"x2" piece that I use when sheeting wings. I believe that it weighs about 2000 pounds or a ton. For its size, it is very heavy. It sits on a steel stand that has steel castor wheels. I can easily move it around in my garage. The stand incorporates three 3/4" threaded bolts. The surface plate sits on top of these three bolts. I am told that this is the optimal way to support a surface plate.

I will post some pictures tomorrow when it is light.

The cost of a surface plate is not bad considering that it is an awesome tool. The total cost of the surface plate plus stand with castors was $1000 -- brand new, and traceable to National Institute of Standards of Technology. I paid another $100 for the smaller piece, and the guy at Precision Granite delivered it to my home. I had to rent a fork lift, but he operated it and placed the table just right on the three bolts.

I use it for all types of purposes that require a very flat surface. You can load it with a lot of weight, and it stays flat.

The story on these tables is that they mine huge pieces of granite rock from a location near Yosemite Nat. Park. They put one rock on a flatbed semi and haul it to Whittier. There, they have a 100 yard long rock saw made out of steel cable. The cable is driven across a pulley, and that slices the rock into slabs. Each of these slabs is then carefully and painstakenly machined by huge diamond disks. This gets the surface fairly flat, but it takes a long time, and they must change the sanding material frequently. I am told that it is very expensive. The slab is now mostly flat, and the edges are incredibly sharp and dangerous. They chamfer the edges, but the guy told me that he has seen several accidents and some lossed fingers during handling of the slab. Next, the surface must be flattened by hand, down to very close tolerances. This is also a very long process, which is why they are expensive. The bigger the table, the more money and weight. He says that he makes his big money by selling to Integrated Chip manufacturers.