Notched Half Unit Blocks connect together with Unit Flats to create a whole new level in block play. This 50 pc set includes both notched blocks and Standard Unit Blocks including: 12 flat unit blocks and 8 notched ½ unit blocks, 10 Small Triangles, 4 Columns, 6 Pillars, and 10 1/2 Pillars. Available in 100 pc, 50 pc and 18 pc sets.