They are BP 1/2" ID, 3/4" OD 45 degree rotary fittings, and the top one has a 10mm extension on it to lift the compression part away from the other fitting. Otherwise, they hit each other and won't screw on. I haven't decided what parts I'm going to use from sneeky's kit, but I plan on using the CPU block for sure. It will probably be a while before that goes in though, due to the time involved and the time available. I had Tuesday and Wednesday off from work, and it took a lot of time over about a 27-hour period to install these. In fact, it took two hours alone to mount each GPU block (remove the stock cooler & clean, mount the block, remove to check contact, adjust and remount, remove to check contact, adjust and remount). I also had to flush the loop, build the SSD/HDD holder three times, and clean the rig in general.