Walkin Wheels brand wheelchair. Used only 3 month so it's like brand new. Size medium for dogs 25-70 pounds. Unlike most wheelchairs, these are completely adjustable in height, width and length. These chair are very lightweight and easy for dogs to use. I have a petite 55# Pit bull that has used it for the 3 months. The reason I will no longer use it is my girl is extremely active and has tipped herself over several times (I have a lot of obstacles in my yard that she catches the wheels on at full speed). This chair is perfect for a less active, old dog or an active dog that is shorter than my girl so there's no tipping hazard. It has 12" foam wheels, no air to worry about. Still have all extra parts, box, dvd, manual, carry bag(chair fold flat for travel), feet stirrups, etc. Bring your dog for a fitting! I paid $439 for the chair alone, in all with shipping it was $487.59. I must recoup some of this. My price is $400, cash only. 284-5675 text or call. I'm in Boise by the airport. Pic is my girl in the chair when we got it and a size chart. Link below is to the website these are sold at.