BACK UP PAD D76 mm,SAINT-GOBAIN 5/16 Med

They are specially designed for microfinishing. They are also available in sizes of 33mm and 150mm in diameter.
Common Characteristics
High quality Norton backup pads are manufactured from neoprene rubber for optimal pressure dissipation. The chamfered edges allow the pads to adhere to the contours of bodywork and reduce the risk of edge-cut.