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SH 50 is the Norelco replacement blade set for AT811 shaver. This information is printed on the shaver packaging and also on the outside packaging of the SH 50 set of replacement blades.
Answered by DukeBlueDurham 1 month ago
Hello! Yes, Philips Norelco Shaving Heads SH50/52 will fit Philips Norelco AT811/40.
Answered by Answered by Philips 1 month ago