Generation 2 Double Halo Replacement Head: Replacement heads for facial hair removal is designed for the second generation facial hair removal device. 360 Degrees Without Dead Ends: Small and discreet, as the original, it removes your facial hair more smooth. It is recommended to replace the facial hair replacement blades for women every 3-6 months months for optimal performance Easy to Replace: Twist and Off design for easy replacement, just twist the old hair remover replacement heads out then twist back with the new one. Neat and Clean Packaging: Each package contains 8 hypoallergenic generation 2 facial hair reomver replacement head and 1 cleaning brush. Notice: tuokiy Generation 2 replacement heads are interchangable between Gen 2 and Generation Pro. Please check your hair removal tool before purchasing.(Notice: If you are not sure of your product model, please check out our second product picture).