I assembled it once and only test-rode it. There are a few scratches from assembly, but it doesn't affect use. Perhaps because it's a foreign product, a detailed assembly manual isn't included, but it can be assembled by looking at the photos. I bought it for my 4.5kg, bedridden Shiba Inu, but his neck and back were bent quite a bit, making it difficult to put him in, so I'm selling it. I think it would be enjoyable for a dog whose neck is strong enough to look forward. Purchased in October 2025 for 12,800 yen (tax included). Mikeart M size Chest: 46-58 cm Distance between front and rear legs: 18-37 cm Hip width: 15-22 cm Length: 24-35 cm Height: 17-30 cm Materials: Lightweight aluminum alloy, EVA wheels A front frame to support the neck is also included, so you can use it for a long time even if the neck weakens by placing cushions or towels. Thank you for looking.