Good absorption capacity and powerful magnetic attraction. As you move the outer magnet, the inner magnet follows, effectively cleaning the glass and suitable for use with variable glass thickness. The streamlined design is artistic and visually appealing. Floating design prevents loose magnets from falling to the bottom of your aquarium, making it convenient to use. Non-slip grip enhances cleaning performance. Brush with scraper included; other accessories shown in the picture are not included. Type: Fish tank brush Material: Plastic Color: As shown in pictures Size: S: Approx. 9 x 4 x 5.4 cm / 3.54 x 1.57 x 2.13 in; Suitable for 40-60 cm (15.75-23.62 in) fish tanks, glass up to 5 mm (0.20 in) thick M: Approx. 12 x 5.6 x 6.5 cm / 4.72 x 2.20 x 2.56 in; Suitable for 60-120 cm (23.62-47.24 in) fish tanks, glass up to 9 mm (0.35 in) thick L: Approx. 13.5 x 6.3 x 7.5 cm / 5.31 x 2.48 x 2.95 in; Suitable for fish tanks over 120 cm (47.24 in), glass up to 12 mm (0.47 in) thick XL: Approx. 13.5 x 6.3 x 7.5 cm / 5.31 x 2.48 x 2.95 in; Suitable for fish tanks over 120 cm (47.24 in), glass up to 18 mm (0.71 in) thick Quantity: 1 Piece Note: Please allow 0-1 cm error due to manual measurement. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Package includes: 1 x Brush (with scraper)