This is the 4x cube cage and assembly jig for the Caged Polycubes puzzle designed by John Rausch. There are 349 assemblies possible outside of the cage and 47 that can be assembled in the cage using 18 different combinations of pieces. Requires 11 pentacubes and 3 tetracubes from Rik's Cube Set to complete. Maple and Walnut hardwoods with lacquer finish. Approximately 3"x3"x3".