This is a carrier that attaches to a bicycle's seat post. I've used it on my MTB for camping trips. As the photos show, there is some rust, but all the components are present and it's still usable. 【Material】 This carrier is made of aluminum, making it lightweight and durable. 【Size】 The platform size is approximately 35x12.5cm in length, and since it attaches to the seat post, it can be mounted on various bicycles. (Post diameter approx. 30mm) 【Type】 Designed as a bicycle carrier, it can safely carry a lot of luggage for camping or long-distance touring. - Material: Aluminum - Overall size (including support): Approx. 52x12.5 cm - Type: Bicycle carrier - Mounting method: Secure the base to the seat post with two hex wrenches Recommended for those who do long-distance touring or use train transport with their bikes. 【Set Contents】 ・Carrier platform ・Clamping base x1 ・Hex bolts for clamping base x2 (Temporarily attached to the carrier for packaging) Will be packaged with bubble wrap and shipped.