this grinding polishing machine mod. gn 50 can receive tiles with maximum size of 50x50 cm, and it can be equipped up to 14 heads. the first 2-3 heads are fitted with diamond discs, and the others are with frankfurt polishing stones. these 11 heads are too enough to allowing to achieve a good polishing surface, with a production capacity of about 700 m2 per 8 h shift on the size 50x50 cm