Panasonic WES9941P Men's Shaver Replacement Outer Foil
Panasonic WES9171P Replacement Stainless Steel Outer Foil for ES-SA40-K, ES3041, ES3830, ES3831, ES3833  Men's Razors, It is recommended that you replace the outer foil and inner blade at least every year to maintain the cuttin edge on your razor,  Made In Japan