Tork 520501 premium foam soap mild s4 system tork 520501 p tork 520501 premium foam soap mild s4 system 6 x 1l is a mildly scented universal soap manufactured for tork soap dispensers and ideal for large traffic washrooms owing to their high capacity p p the premium mild foam soap provides both an efficient and pleasant hand wash courtesy of the quick lather that can be achieved while also remaining dermatologically tested contains skin caring ingredients that cater for sensitive ski