?When to Replace My Toothbrush Head?The toothbrush heads blue bristles will fade in color to indicator you should replace your electric brush heads, if 1/3 of the blue bristles fade, it is time for a replacement toothbrush heads , please replace your electric toothbrush heads in time to ensuring most effective clean. ?Premium End-rounded Dupont Bristles?Aoremon replacement toothbrush heads are made with End-rounded Dupont Tynex bristles, the bristles penetrate deep between teeth to sweep and not hurt your gums, our replacement brush heads for e series let you feel comfortable and extra-gentle, make you have an exceptional brushing experience every day. ?Easy to Achieve Deep Cleaning of Your Teeth? Aoremon toothbrush replacement heads for e series features a contoured profile to naturally, fit the shape of your teeth for a thorough clean, and the unique angled neck helps you reach back teeth, the slim angled neck enables you to easily maneuver the toothbrush head, particularly in hard-to-reach areas to remove plaque. ?High Compatibility?Aoremon replacement heads design for Philips Sonicare screw-on system toothbrush, they are compatible with Sonicare e eseries, Essence, Elite, Xtreme, Advance. These replacement toothbrush head can be easily screwed into and unscrew the toothbrush handle for a firm fit, easy to instal and cleaning. ?Use Aoremon Replacement for Philips Sonicare with No Worries?Aoremon toothbrush heads are manufactured independently in a facility which are made with the Dupont bristles with good performance material, and each brush head is put through its paces to ensure durability and an exceptional performance every time you brush.