The Flexipad Medium Density Pads are suitable for polishing and grinding, these will accept GRIP® and hook and loop backed sanding discs. The super polyurethane backing pad is made from impact resistant synthetic nylon which is bonded to microcellular polyurethane and with internal thread to suit sanders and polishers. Excellent resistance to initial and continuing tearing, oil and ageing. Made in Great Britain.Diameter: 150mm.Metal Centre threaded internally: M14 x 2.