Each brush has high-quality Japanese nylon bristles. A special brush cap is included with each brush.  The different brush types are: Fill In, Gradation, Builder, Art, Art Liner, Long Liner, Angular, Oval & Multi Round. Scroll down for photos and information on specific INITY brushes below:Fill In #8 (newest)This brush features a wide, square head with short bristles, optimized to pair perfectly with Fit Base Plus. It simplifies the fill-in process, saving you valuable time. - Generous Brush Area: The brush area allows you to pick up a substantial amount of gel in one application.- Broad Coverage: Its width enables you to smooth large surfaces quickly and evenly.- Easy Handling: The brush's length ensures a comfortable grip and effortless control.- Precision Corners: The square corners make it easy to apply gel precisely to edges and corners. Bristle Length:8mm, Bristle Width: 6mm, Thickness:2.2mm, Total Length: 146mm Gradation #11A wide gradation/ombre brush. The brush has a soft shape that is hard to apply pressure, making it easy to create ombre/gradation designs. Bristle length:11mm, Bristle width:7.3mm, Thickness:1.5mm, Total Length: 149mm Builder #9A flat brush with strong elasticityIdeal for floaters and extensions using highly viscous gels. Bristle length:9mm, Bristle width:5.8mm, Thickness:2mm, Total Length: 145.5mm Art #8An art brush with moderate thickness and length that can handle a lot of colour gel in one go. Suitable for bold art. Bristle length:8mm, Bristle width:2mm, Total Length: 150.5mm Art Liner #7This liner brush makes drawing fine lines easy. It can be used to easily draw smooth curves and circles, making it suitable for artwork that requires delicacy and finesse. Bristle length:7mm, Bristle width:6mm, Total Length: 148.5mm Long Liner #12Long liner brush with firm bristles so that the brush handle does not shake easily. Recommended for drag/line art. Bristle length:12mm, Bristle width:5mm, Total Length: 155mm Angular #8Firmly angled angular brush. The top bristles are long enough to create a clean french line. Bristle length:8mm to 5mm, Bristle width:5.2mm, Thickness:1.9mm, Total Length: 150.5mmOval #7An oval brush with reduced thickness. The gentle oval-shaped bristles make it easy to apply one colour with a clean cuticle line Bristle length:7mm, Bristle width:5.7mm, Thickness:1.9mm, Total Length: 145mm     Multi Round #8This brush has special square-shaped bristles with thin, angular tips for smooth application in the cuticle area. It can be used for base, colour, top, and multiple applications with appropriate firmness. Bristle length:8mm, Bristle width:5.8mm, Thickness:2.1mm, Total Length: 145mm