BLACK BEAUTY Abrasive Blast Media Extra Fine Abrasive 30/60 Mesh Size for use in Sandblast Cabinet - 25 LBS Extra Fine Grit 30/60 Blast Media - 25 lbs. bag Low free silica less than 0.1% compared to sand at up to 99% free silica General purpose repair and maintenance blasting for the removal of paint and rust, structural steel. Fast cutting, uniform density, consistent gradation. 100% recycled, "green" product. Harsco's BLACK BEAUTY blasting abrasive has been number one in the industry for nearly 80 years.