Compatible with Polaris 180, 280, 360, 380, 480 Pro, 3900 Sport, and works with Polaris 91003105 / 9-100-3105 / PP-91003105. Size: OD: 1.7", ID: 0.55", Length: 2.87". Simply replace the worn tail cleaner with a new tail brush at the end of the hose. These absorbent filter sponges feature uniform parallel holes to effectively capture large debris and particles, effectively removing pool cleaners. They also help scrub the bottom and sides of the pool. Package Contents: 12 foam brushes, eliminating the need for weekly replacements. Description: These absorbent filter sponges feature uniform parallel holes for Effectively capture large debris and particles, effectively removing pool cleaners. They also help scrub the bottom and sides of the pool. Features: Material: Sponge Outer Diameter: 4.3 cm. Inner Diameter: 1.4 cm. Length: 7.3 cm. Package Contents: 12 Foam Brushes