3M6200J红色钻石磨块M75海绵打磨块 For hard to grind material, stone, glass, ceramic, metal, carbide, composites. Metal plated bond securely anchors micron graded diamonds to backing. For wet or dry applications. Durability improves when used with water or oil lubricants. 3M6200J红色钻石磨块M75海绵打磨块MC,FLEXIBLE DIAMOND PRODUCT产品实物拍摄图片