The ProSand Multi-Air Cyclonic A975 fine grit paper has a P-graded, seeded-gel ceramic alumina abrasive. Its laser-cut vacuum hole design gives it a long life and the water-based, non-pigmented stearate avoids color transfer to your work piece while minimizing load. This disc is a great choice for fine-grit vacuum sanding and finishing and its hook and loop back allow easy mounting and changing to speed your workflow.