There is a big gotcha with some reels which I found about the hard way. I use a lot of air tools and after we installed two no name reels I wondered why our air tools were a bit short of grunt as the hoses were 3/8" the same as the original lines so I pulled one apart. What we found is that the air entry was 1/4" restricting the air flow hugely so we made new 1/2" fittings and all is well. Why they restricted the air inlet is one of life's mysteries yet to be solved.
Chris
Everything I like is either illegal, immoral or fattening