This is a 6 sided die with the numbers written in binary. Read as follows:

1. 0001
2. 0010
3. 0011
4. 0100
5. 0101
6. 0110

size is 16x16x16 mm like a standard due and prints in about half an hour. I used 0.4 mm nozzle, .2mm layer height, no raft. Uses about 2 grams