Lip / Concealer Brush - 110 has a smaller, oval and flat tip which is suited for applying lipstick or a concealer.
Always clean your brush after using it. This will extend the lifetime and decrease the risk of spreading bacteria. Your makeup will also be much better with clean tools.
Clean the brushes with Brush Soap, ordinary soap or detergent in lukewarm water. Avoid moistening the brush's shaft. Let the brush air dry lying flat.