Nutshell granules are an extremely soft, organic reusable blasting agent made from broken, cleaned andsievedwalnut/hazelnut/apricot kernel shells.Granules are belong to very hard, light, natural abrasives. Nutshell granules belong to reusable abrasive, feature low impact on the blasting surface without damaging undersurface of material. Nutshell granules are 100% natural product and they are free of respirable crystalline silica (SiO2). Origin: Turkey