100% Customer Satisfaction: We truly would like you to be happy with your new Toothbrush Heads. If you have any questions, please feel free to contact us and your satisfaction is always our first consideration. Reminder Bristles: It can be easily seen that blue indicator bristles will fade to let you know a replacement is needed. You don't need to worry about missing the optimal replacement time!. Gentle and Reliable: With over 95% ratio end-rounded bristles, GEILSI Toothbrush Heads protect your teeth and gum while brushing under vibration; their US DuPont filaments will also bring you satisfactory brushing experience. Effective and Thorough Cleaning: The bristles of these replacement brush heads are professionally contoured, which fits naturally to the shape of your teeth removing 100% more stains and plaque in hard-to-reach areas versus a manual toothbrush. Full Compatibility: GEILSI replacement heads fits perfectly for Fairywill FW-507/508/515/551/917/959/2011/D1/D3/D7/D8.

Best Sellers Rank: See Top 100 in Health & Household. Compatible Devices: Fairywill. Item Firmness Description: Soft. Age Range (Description): Adult. Material: Plastic. Brand: GEILSI. : B0BJPHS43K. Manufacturer: GEILSI. Date First Available: October 19, 2022. Product Dimensions: 5.91 x 3.86 x 1.1 inches; 2.89 Ounces.