Feature●Crushed Glass - 5 lb●Clean, white-metal finish●No free silica, heavy metals or other contaminants●Angular shape offers quick stripping (similar to silica in hardness)●Ideal for 1st step cut down. Cycle Time: 3-5 hoursDescription Crushed Glass Clean, white-metal finish No free silica, heavy metals or other contaminants Angular shape offers quick stripping (similar to silica in hardness) Ideal for 1st step cut down Cycle Time: 3-5 hours