PREMIUM MATERIALS: Made from premium materials, it is always functional, efficient and easy to use. Wide compatibility: compatible with Philips PT710 PT715 PT720 PT721 PT722 PT724 PT725 PT726 PT727 PT728 PT730 PT731 PT732 PT734 PT735 PT736 PT737 PT739 PT786 PT810 PT815 PT860 PT866 PT868 PT880 AT810 AT811 AT814 90 AT891 AT893 AT910 AT911 AT750 AT751 AT752 AT753 AT754 AT757 AT758 AT798 AT891 AT926 etc. Instructions for use: Shaving heads should be affected every eighteen months.Easy to install.Clean the shaver before installation. PERFECT PERFORMANCE: Replacing the shaving heads results in a 25% more efficient shave.Clean the product regularly for optimal performance. Replacement Shaving Heads: Replacement shaving heads will restore your shaver to performance and give you a closer shave.2. Durable and easy to clean: The shaving head is made of high quality ABS and high quality steel, with a very practical cleaning brush.3. Razor head size: length, width and height are about 60*50*30mm/2.36*1.97*1.18in.List: 1 * shaving head