Braun 94M shaving cassette (silver) for shaver models listed below. This 5-Element shaving cassette fits ALL Braun Series 9 shavers. Within 18 months of daily use, your Braun shaver cuts an average of 6,000,000 hairs. During this time the cutting parts will gradually wear out and you will notice a reduction in performance and comfort. To maintain the high performance level of your Braun shaver, the shaving head should be replaced within 18 months.