Dear We are searching for a stone flour milling machine for making flour from beans/grains, the size we prefer as small as possible because we are starters. What is the RPM of your machine, and it produce how many decibels of music produce it during milling. What is the mesh size of your flour( minimum and maximum )? Stones from sandstone, no granite. can you send us photo's of he machine with details, and the price. Is there a difference in price and lifetime, between the different stones?Our port of destination is Semarang Jawa Tengah IndonesiaWe thank you in advance for your info.While waiting, we send you our,Best RegardsLukas CroesKOMILFOOMagelandIndonesiaCondition:NewProduction Capacity:70kg/h Show More