The Jar Mill Test Machine is designed to reduce from 5 mm to powder granulometric materials like: cement, stones, rocks, hard materials. Three models available: 0,3 - 1 - 1,5 litre jar capacity. Jar is in prokorund material with relevant hard porcelain spheres Noise reduction steel cabinet and microswitch to 89/392/CEE Directive. Built in timer. Supplied complete.