This industrial grade diamond lapping compound is excellent for completingrepairs to damaged valve casings and pistons. Diamond CrystalsThe compound's diamond crystals offer superior cutting action, making quickwork of any size lapping job. Micro Fine Abrasive Rating'Abrasive rating' refers to the size of the particles in a compound thatactually do the cutting, much like the term 'grit' is used in describingsandpaper. Because diamond crystals are extremely resistant to breakdown theiractual size can be much smaller or finer than the abrasive particles found inother types of compounds, a factor which results in a smoother, moreprofessional finish to the valve casing and piston. The abrasive rating for ourlapping compound is 8 - 15 microns. (A micron is one thousandth of a millimeteror approximately .00004".) Water SolubleBecause the compound is water based it quickly and easily washes out of theinstrument with soap and water. No special solvents needed. Also performs well for working in tuning slides and key hinge screw rods.Only a very small amount is needed - a 2 gram supply will do many jobs. Comes ina handy, economical syringe applicator with complete lapping instructions. Also available in 5 gram tube.