CEREC Ivoclar IPS e.max CAD MO Block, Shade 1 Size A14(L) 5/Pk. IPS e.max CAD is a system of lithium disilicate glass-ceramic blocks for CAD/CAM dental restorations using CEREC and inLab systems. A14 block features a special interface for Sirona Ti base. MO (Medium Opacity) A14 block is optimized for hybrid abutments. Package of 5 blocks