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Review Details
Philips Norelco Replacement 3-20mm Adjustable Hair Comb for QuickGroom Models, fits 32mm Blade
Product Review (submitted on May 23, 2022):Only allows 3-17mm, won't stay at 18, 19, or 20mm settings on my shaver. Unfortunately 20mm is the length I use most.
Looks like I might be able modify this part with a dremmel tool to make it work.