2-inch bolts included The story of the Waterborne Bamboo Block risers begins with the original Surf Adapter. It was our first venture into any sort of mass production of a product. Sourcing black plastic riser blocks was all too easy. You can buy huge boxes of them relatively inexpensively. However as time went on and these boxes got larger and larger, it became ever apparent that our footprint, one that would surely outlast everyone of us, was growing as well. With every Surf Adapter made there would also be 2 blocks of plastic. That is a massive amount of ugly plastic blocks being produced under our direction. It was time to make a change. We reached out to our industrious friends who are experts in CNC machining wood, and asked if they could CNC our riser blocks from sheets of bamboo. A few weeks later we were stunned at the beauty of the finished lacquered blocks. They really do look great and feel great in your hand. Of course they do also perform their job as risers for a skate truck very well too. However for us the story of the decision to forgo Economy in favor of Ecology is what comes to mind every time we look at these bamboo blocks. Ships from: California, or Asia