A blow molded, hollow plastic container including two opposed, relatively longer sidewall and shoulder portions which alternate with two opposed, relatively shorter sidewall and shoulder portions. The embodiments represented herein apply to both thin film and bulk growth of 2H-SiC. The filter element includes a tubular filter media circumscribing the standpipe, a first end cap supporting the filter media at one end thereof, a second end cap longitudinally spaced from the first end cap and supporting the filter media at the opposite end thereof, and a center tube extending between the first and second end caps. Floating-point store and integer-transfer unary instructions may be converted to new instructions. In a further embodiment, the toy block displays one or more numbers that are numerical elements in a plurality of mathematical equations forming a \u201cfact family.