I had some questions about the tubes and flow path, hopefully this helps give you a sense:



A typical 120mm double thickness radiator has 12 columns of tubes two rows deep (except the RX series which has three rows).

# Tubes

Typical Slim 120mm radiator = 12 each
Typical Double thickness 120mm radiator = 24 each
Monsta 120/140 Quad thickness = 56 each

This is the main reason it has very low restriction, it has over twice the number of tubes to flow through as a normal double thickness design. These extra tubes are needed both for the 140mm width and also the quad thickness.