Ivorine-4™ is the hardest and strongest ferrule material in the market. It machines like stainless steel, so make sure you have a metal lathe with carbide tooling to machine it. Makes an excellent bond with epoxy and most glues. Ivorine-4™ has a very fine weave and a beautiful soft white color. It is a thermo-set material, so it will never melt or mushroom.