Sonicety Replacement Brush Heads for Sonicety HI-920 HI-923， 4-Pack<div style="text-align: left;"><strong>[Product Information]</strong><ul><li class="showHiddenFeatureBullets"><span class="a-list-item"> Materials: ABS， TPE， Dupont Nylon Bristles </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Heat Resistance: 70℃/158°F </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41HSnK-1dqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VCdCUjm0L.jpg" noproxy>