Descriptions:Modern production lines and in-house design Our jumbo roll has a excellent price performance ratioBacking: X,Y, polyester cloth Abrasive grain: Brown aluminum oxide Black silicorn carbide Zirconia aluminumBond: resin-over-resin Coating: closed, semi-open (for wood working) High stock removed for metal & wood working Good price/performance ratio Size: 1,400mm x 50m/100m Grit: P24 to P600