Material: This bike V brake extender adapter is made of aluminum alloy, which is wear resistant, durable, and not easy to break. Replacing part: The bike brake extension converter can be used as a spare part to replace old or broken accessories. Easy to install: This bike extend adapter is small in size and can be easily installed on the bike with tools. Application: The bike brake extender adapter can upgrade and modify the performance of the folding bike V brake. Wide usage: This bicycle brake accessory is widely applicable for use in household and professional repair shops. Specification: Material: Aluminum alloy Color: Black, red, gold, silver, colorful Size: Approx. 42x25mm / 1.65x0.98 inch Note: There might be slight color variations due to different screen resolutions. There might be a slight measurement error due to manual measuring. Package Includes: 2 Pieces V Brake Extender Adapters (with 2 Pieces M10 Brake Accessories, 2 Pieces M10 Fixed Screws)