General description Compatible with Polaris robotic pool cleaners including models 180, 280, 360, 380, 480 Pro, and 3900 Sport. This 12-pack of foam brushes is designed to effectively clean your pool by capturing large debris and particles while scrubbing the bottom and sides. Technical specifications Outer Diameter: 4.3 cm Inner Diameter: 1.4 cm Length: 7.3 cm Installation Easy to install by simply replacing the worn tail scrubber with a new tail brush. Usage These filter absorbent sponges contain uniform parallel holes that help to effectively capture debris and enhance cleaning performance. Other information