Adaptation: Shaver Replacement Head Compatible with Philips Electric Shavers Series 7000\/9000 RQ12 Models. Please make sure your razor model is good. Compatible Series 7000 Models: S7310, S7311, S7320, S7340, S7370, S7510, S7520, S7530, S7710, S7720, S7740, S7780, S7910, S7950, S7970. Compatible Series 9000 Models: S9031, S9041, S9051, S9090, S9111, S9121, S9151, S9152, S9161, S9171, S9181, S9182, S9311, S9321, S9371, S9511, S9512, S9521, S9522, S9531, S9551, S9711, S9712, S9721, S9731, S9733, S9751, S9781, S9800, S9850, S9911, S9988 etc. Compatible with RQ12 Models: RQ1250, RQ1251, RQ1252, RQ1255, RQ1258, RQ1265, RQ1275, RQ1280, RQ1285, RQ1286, RQ1290, RQ1295, RQ1296 etc. Easy to Install: The razor replacement head is easy to install and disassemble, very convenient, washable, sharp and durable. Just change the shaving head, you can give your shaver a new look.