Graph Tech PS-8166-00 String Saver Dimensions: L: 11.5mm D: 6mm (6 pieces), roll-shaped Compatible with: for example, Telecaster (TM)Finish: With Trem-Nut is a material which is about 500 times (!!) is more slippery than graphite. With each movement of the string in the saddle notch
or on the web is Trem-Nut smallest Particle-free and thus lubricates itself.
The sound can be with steel saddles Compare, however, with about 25% more sustain !!