51WS Walnut Shells

51A Replacement Sand -A medium grit silica for sand blasting and cleaning the surfaces of precious and non-precious metals prior to processing of dental appliances, crowns, etc. Shipping Wgt.: 5 lbs [2.3 Kg] 51WS Walnut Shells - for use in removing investment and plaster from appliances. Must be utilized with higher air pressure and larger office. Shipping Wgt.: 20 lbs [9.1 Kg]