Norelco HQ167 Advantage electric shaver heads.
Norelco HQ167 (Replaces HQ156) Advantage electric razor heads, set of three. Fits only Norelco razor models 561X, 5615X, 5616X, 5655X, 6701X, 6705X, 6706X, 6709X, 6711X, 6716X, 6735X, 6737X & 6756X.