The description is somewhat misleading, 140mm fans that can use 120mm mounting holes have been around for a long time, with most usages being mounted on CPU cooler heat sinks. The 38mm thickness will of course give more air flow, but in an age where low - medium fpi rads dominate themarket, I don't see much of a market. Ye, we still see quotes from 1990s / turn of the milenium forum posts when high fpi rads warranted the need for high static pressure. But those days are long gone by.
This basically turns a push / pull installation into the equivalent thickness of a rad and 3 fans ... thereby leaving one with the choice of lopping off rad thickness or fans which would produce better results. Price isn't too bad, will depend on specials... I usually pick up Phanteks fans by the dozen when newegg has them for $10 a pop. In addition, PWN historically had an advantage by being able to maintain lower speeds w/ stalling ... the downside was cost, clicking noises / low speed hum and, with some vendors, the iunability to gang more than a handful of fans on a single channel. But with today's newer DCV fan designs, smarter MoBo utilities and PWM=> DCV fan hubs we can get PWM fan speeds w/o any of those disadvantages.
