It consists of close to 2m of hard drawn 1/2'' copper pipe, 10 copper 90 degree elbows, a copper T peice and around 40-50m of 2.5mm2 multistrand copper wire.
I'm using 2x 12cm Enermax adjustable speed fans.
The particular wire I used is standard 240v earth wire (for houses)
It has a built in bleed/fill point, it relys on the mounting to the side of the case to provide a "back wall" to direct the air out through the fine wire.
I'll hook it up to my system now and will report back with the results.