Electric Toothbrush Head Refills - 2 Pack - BenefitsBristles last 4x longer than natural toothbrush bristlesPairs with Moon Electric Toothbrush2-Pack interchangeable brush head refillTapered, ultra-fine bristles that reach deeper for a better clean and whiter teethOne with black bristles and one with white bristlesFormulated WithoutSLS/SLESParabensArtificial FlavorsIncludes2 Interchangeable brush heads (white and black) featuring cutting-edge, ultra-strong bristles with a superfine feel. - Electric Toothbrush Head Refills - 2 Pack