Packing: 1pcs Material: sponge Size: 93mm(3.66in)x93mm(3.66in)x93mm(3.66in) Thickness 12mm(0.47in) Made of soft, durable foam that makes sanding any shape easier while minimizing burns. Added support disc pad improves abrasive cut and tighter edge sanding Can help you collect dust effectively, keep the surface clean, maximize the performance of the sanding disc and extend the life of the disc How to use:Combine the white pile coated surface with the abrasive disc and the black hook and loop fastener surface with the sandpaper Suitable for polishing uneven surfaces Suitable for most brands of sanders, sanding discs and sandpaper