Philips RQ12 Pro SensoTouch 3D, Arcitec shaving heads for shavers listed below. The original RQ12 Pro heads have been discontinued by Philips and the shaving heads replaced with the SH90. In order for these heads to attach to the older Philips SensoTouch and Arcitec shavers, a bottom frame assembly is required. You will be receiving the bottom frame as well as the SH90 shaving heads. These are genuine Philips parts, made in Holland.