JUIN TECH GT-P 4 Pistons Road CX Hydraulic Disc Brake Caliper Set (F+R), Black
In my opinion, the only cable actuated caliper's you should use. If you have a disc brake bike and want hydraulic stopping power without replacing your whole system this is the best option. I have used these but you can't tell to look at them. They come boxed with some mounting bolts, adapters and a lightly used set of pads each.