The following are typical specifications and features of a standard medical wheelchair:

1. Seat Width: The seat width of a medical wheelchair typically ranges from 16-20 inches.

2. Seat Depth: The seat depth typically ranges from 16-18 inches.

3. Seat Height: The seat height is usually adjustable to accommodate different users' needs.

4. Backrest Height: The backrest height is adjustable to provide maximum comfort and support.

5. Armrests: The armrests are usually padded and adjustable to support the arms and shoulders.

6. Footrests: The footrests are usually removable and adjustable to accommodate different leg lengths.

7. Wheels: Medical wheelchairs typically have two large rear wheels and two smaller front wheels for easy maneuverability.

8. Brakes: The brakes on a medical wheelchair are usually located on the rear wheels and are operated by hand.

9. Weight Capacity: The weight capacity of a medical wheelchair varies, but typically ranges from 250-500 pounds.

10. Folding Design: Most medical wheelchairs can be folded for easy storage and transportation.

11. Material: Medical wheelchairs are usually made of lightweight and durable materials, such as aluminum or steel.

12. Accessories: Some medical wheelchairs may come with additional accessories, such as seat cushions, backrest cushions, or storage pouches.