Fibre Glass Backing Plate Europeans safety performance: The backing for the flap discs are safe under the max speed of 80m/s. Quality contaol: Professional technical knowledge and modernest processing mechod is the guaratee in quality. Dimension precision guarantee: With thickness Error: +/10.2mm, it is guaranteed for smoothly working for auto machines. More benefit to the buyers: Sufficient and complete supply in quantity, sizes,types and styles with tymely delivery.