1. Philips shaving heads For Cool Skin OQQO series models Replace the shaving heads every 2 years for optimal shaving performance Lift amp Cut shaving system e Dual blade system lifts hair to cut comfortably Glide Rings e For smoother shaving and less skin irritation PHILIPS sense and simplicity Shaving heads Specifications PHILIPS Issue date 2007 10 06 Version 3 0 2007 Koninklijke Philips Electronics N V All Rights reserved Specifications are subject to change without notice Trademarks are the property of Koninklijke Philips Electronics N V or their respective owners www philips com