This comfortable and soft backrest is made of selected material. It is very comfortable and ultra sturdy, provides you with a comfortable riding position.The curved metal holder ensures the security for your safety. Features - Color: As shown -Material: Iron, sponge, leather - Size: 21.00X18.00X12.00cm/8.25X7.07X4.72in -This electric bike backrest is compatible with many types of electric bicycles, featuring a simple design that makes it easy to clean and install. -The stable bracket used in this backrest is durable and strong, ensuring that it can work for a long time. -The excellent performance and fashionable design of this backrest meet your requirements, providing both functionality and style. -The comfortable cushion of this backrest is perfect for long travels, featuring a vented ergonomic design that relieves pressure and maintains a comfortable and breathable ride for extended periods. -This bike backrest is versatile and easy to mount, making it suitable for all kinds of bikes, including mountain bikes, road bikes, and folding bikes. Package list: 1 backrest