Check the listing for details. 1 oz MICROLUBROL Hexagonal Boron Nitride hBN Powder Ultra FINE 0.5 µ Micron. Condition: New. Listed at 22.95 USD. Hexagonal Boron Nitride, also known as just Boron Nitride or hBN and sometimes called "white graphite," is a chemical compound that is produced from boron compounds in a high temperature reaction. It is one of the most lubricious materials known. With a coefficient of friction as low as 0.15, and being "cleaner" to use than molybdenum disulfide and tungsten disulfide, it is a superb dry lubricant for many applications, particularly bullet and gun barrel coating. FEATURES:It is a superb dry lubricant for many applications, particularly bullet and gun barrel coating.Extreme load carrying ability. Low coefficient of friction: 0.15. Chemically inert in lubrication applications.Lubricates extremely well under all conditions: heat, cold, pressure, vacuum and high loads. Compatible with other lubricants.Superior thermal stability. Non-combustible. Resistant to oxidation at high temperatures .Compatible with ALL metals, ALL plastics and elastomers, water, solvents, fuels, oils, paints, plastic resins.SPECIFICATIONS: - Material: Hexagonal Boron Nitride (hBN, boron nitride, "white graphite") - Purity: 98% - Average Particle Size (APS): 0.5 micrometers (microns, µm, micrometers), approximately 12000 mesh equivalent ("mesh" is a measure of the fineness of a material separation screen, but due to the impossibility of weaving such fine wires or filaments to produce such a fine screen there are no actual screens with mesh finer than 600 available, so the number is for relative particle size comparison only).- Color: White - Coefficient of Friction (COF): as low as 0.15 - Density: 2.3 gms/cc - Hardness: Approx. 1-2 on Moh's hardness scaleNOTE: The Hexagonal Boron Nitride (hBN) product offered here is NOT cosmetic grade and has not been tested for use in cosmetics or any other regulated use.