You are looking at a solid acrylic cube of clear acrylic. These are great as risers to display jewelry, small art objects or as a single piece to be grouped with several other acrylic risers to display many objects. They are all hand polished with square corners. We do many risers / blocks of acrylic in many different thicknesses. If you look in our store you will see them from half inch all the way through 4". If you need thicker than 4" that can be done so call us for a custom quote. We will not be undersold on blocks. We are the largest provider of acrylic blocks in the country. If there is a better advertised price out there we will beat it! Just show us where you see the better price and we will beat it by 5%. We would love your business so don't hesitate to contact us with your requirements. Thank you for shopping with us at PlasticMart.