Two sets of levers, clamps and master cylinders weigh 112g. Levers, master cylinder body and lever clamp are made from carbon fiber / carbotecture.

After some use the master cylinder piston can get sticky. A clean and re-grease Will have it performing like new again.

I've been using a set of these on the front with my Magura MT8/MTS brakes:

Quick facts:

The Hygia SLP brakes start out as a fairly light set of disc brakes. The rotors at less than 80g each are already about as light as you can go without resorting to titanium, aluminum ...

Here's some information I have collected on 180, 160 and 140mm lightweight disc brake rotors: