Q-Silver 5" P1500 Grit Silicon Carbide Hook-and-Loop Discs (50 Pieces) by Mirka Abrasives. Q-Silver is an abrasive with optimal aggressivity to achieve fast and efficient stock removal. The product possesses high heat endurance and is tough in down-to-metal sanding operations, for example in automotive paint sanding. The performance in sanding of hard wood and composites is also extremely good. The backing utilizes a flexible and strong latex impregnated paper.