"Hesling Flex chain screen for 28" Bicycles is a transparent plastic chain screen that is suitable for 28 "bicycles. The chain screen has a length of 50 cm and a height of 21 cm. It is specifically designed for bicycles with a crank hole diameter of 14 cm and A gear with 46 teeth. Product Specifications: - Color: Transparent - Material: Plastic - Length: 50 cm - Height: 21 cm - Diameter Crankhole: 14 cm - Number of teeth: 46