check to see if you get fittings with the parts you ordered. i got lucky. my rad, cpu block, pump, gpu universal block....all came with 1/2...im waiting on my second rad and reservoir so far it looks like i need to buy 2-4 90 degree fittings on my own. the 2 blocks could work with fittings they came with and 2 inches of hose. buy 10ft uv and messure twice cut once.