Thank you for viewing. This is a Graphtec PS-8000-F0. It's a wide-pitch specification. I received it from a friend as unused. I've been storing it without using it. The PS-8000-F0 is a String Saver original saddle for Stratocasters with a wide pitch, also known as eleven-pitch specification, used in vintage styles. String Saver creates a thin Teflon film as the strings move and vibrate against the saddle, reducing string breakage and improving tuning stability. It also provides the depth and sharpness of tone found in vintage saddles, along with rich sustain. Thank you for your consideration.