Easy-to-apply replacement pads for N and OO/HO scale Roto Wheel Cleaners™. Will not scratch wheels.6 sets of Cleaning Pads - 76 3/4" (194 cm) & 2 sets of Scrubbing Pads - 25 1/2" (64.7 cm) for the N scale Cleaner or 3 sets of Cleaning Pads - 76 3/4" (194 cm) & 1 set of Scrubbing Pads - 25 1/2" (64.7 cm) for the OO/HO scale CleanerThese are replacement easy-to-apply replacement pads for both the N gauge (WTT4560) and the OO/HO Gauge (WTT4561) Roto Wheel Cleaners. These are formulated so as to not scratch your locomitve and rolloing stock hweels.There is sufficient material in the package to provide 6 sets of Cleaning Pads plus 2 sets of Scrubbing Pads for the N Gauge device, OR 3 sets of Cleaning Pads plus 1 set of Scrubbing Pads for the OO/HO Gauge Cleaner.