Traditional rubber bellows trap dirt and bacteria, but ASKO washing machines with Steel Seal™ eliminate this issue. Eliminating the rubber bellow ensures a hygienic wash cycle with 95% less bacterial growth, proven by a third-party institute*. The Steel Seal™ also increases durability and makes loading and unloading easier. *d to traditional washing machines with rubber bellow. Independant testing by Mikrobiologija Avbersek (Slovenia) Quattro Construction™ 2.0 by ASKO significantly reduces noise and vibrations during washing and spinning. Equipped with four strong shock absorbers to minimize large movements and reduce wear. Additional features include a reinforced steel base plate, a sturdy cast iron motor mount, and a motorized door lock.