A557-A557K-A757-A757K is ultimate series of vacuum cleaners. It is the appropriate accommodation small size, cost and performance. Electrical control box chip as standard, star filter Ø 560 with big filtering surface of 3.4 m², possibility of installing the whole range of alternative RGS, are just some of the advantages of these vacuum cleaners. Series is available with multi-tension three-phase motor with 4kw and 5.5kw of ability and able with removable container with 100 lit of capacity.