Product includes only 3 new upgraded HQ8 replacement heads for norelco aquatec shaver. ATTENTION: After installation, place a tiny drop of baby oil on each heads and allow shaver to run for 10 seconds. These steps will help to ensure your shaver properly and smoothly running. HQ8 Norelco Replacement Heads every 12 Months for Best Results. Upgraded Precision Cutting System for Norelco Replacement Heads HQ8, 360 Degrees without Dead Ends. Remove your beard gently, painlessly and cleaner. Compatible with several series of Norelco razors. 71--, 72--, 73--, 7800, PT/AT 7--, PT/AT 8--, and 88-- series.These are the real deal to renew your razor's close cut when your old heads wear out and get dull. HQ8 Replacement Heads for Philips Norelco Shavers is designed per the curve of human face so it fit perfectly to your face. The low friction tip can conform to the curve of your face and protect you from skin damage.