actually the complete width is around 24+ inches
the core is 19+ width by 14.5 tall (really big ic)
but either way they are tested up to 450Whp
also from the factory they are about $500-1000 depending on the size
there are small,med,large
the one on ebay is a medium

plus the best part about them is that they can be so customized.
chop it in half, weld on new bottom tank plates there you go more compact ic with same statistics
they can also be widened... put 2 of them together (cut and weld end plates)

just so you know