> G-10 is a acronym for Garolite-10/FR-4,which is basically a combination of fiberglass strands set in epoxy. It's primary use is as an electrical/thermal insulator,and it also has uses in electronics and is used by NASA. It is rated at 110 on the Rockwell M scale,takes about 20,000 PSI to break it in half (shear strength),and is said to be very tricky to machine. As a joint pin,it is as light as it gets,with a pin weighing about 1/10 of an equal sized stainless screw. Joe Gold uses it almost exclusively,and was probably the first to use it. It is usually a whitish color,with a slight green tint. I can't imagine how slick a G-10 tip must be,but I have seen them in several different versions now. Tommy D.