"11" allows you to enjoy a whole new way of recombining Blockers parts, and a new standard in the "Joint Set" that expands the range of recombination play! "10" allows you to connect parts more compactly than existing products, and "11" allows you to enjoy a whole new way of recombining! The 4mm joints common to the series allow you to create anything from a few centimeters in height to large works over 1m in height!