71mm zirconia block features 6 layers of natural color transition, matching color gradient of natural tooth from cervical to incisal. Translucency changes from 57% in incisal to 43% in cervical. It shows gradient decrease, achieving life-like transparency of natural tooth enamel while low transparency in cervical has effective opaque. http://www.zirconiablocks.com/....zirconia-block/71mm-