The glass unit contains a 4 move method of 1 Every single 100g nickel bond, 260g nickel bond, 325g resin bond, and synthetic felt discs. The lapidary program is similar with yet another 600g resin disc integrated. Dec 28, 2018 #seven The flat surface doesn't need to be glass, in http://brookssrmn069.timeforchangecounselling.com/14-questions-you-might-be-afraid-to-ask-about-silicon-carbide-diode