Versatile Use: Ideal for carrying coffee tumblers or portable speakers on bike rides. Adjustable Size: Fits upper diameters of 75 - 90 mm (2.9” - 3.5”) and lower diameters of 60 - 78 mm (2.4” - 3.1”). Height Adjustable: Accommodates heights from 175 - 240 mm (6.9” - 9.4”) for various tumbler or speaker sizes. Durable Construction: Made from engineering-grade polymer and rubber for long-lasting use. Compact and Lightweight: Measures 7.6”-8.3” x 3.7” x 3.5” and weighs only 4.22 oz, ensuring easy installation and minimal weight addition.