Gold P.S.A. (Pressure Sensitive Adhesive) sanding discs are available in 150mm diameter. Separate pack of 10 available in 4 Grits: 80grit , 120 grit , 180 grit , 320 grit Manufactured from premium quality aluminium oxide grain with a specialised stearate coating and a semi-open grit binding which prevents clogging, sticking, pill forming and significantly increases the speed the PSA sanding discs can achieve. Suitable for general industrial sanding but are also designed for applications involving paint sanding, lacquers, putty and primers. The heavy duty paper backing makes the product extremely durable and long lasting. The PSA backing pad ensures quick and easy changes on most brands of sanders.