1. Suitable for wheelchairs with a distance of 16 to 20 inches between two armrests. 2. There are four holes in the back of the wheelchair table that can be adjusted to the appropriate hole position depending on the width of the wheelchair,Installation, disassembly is very convenient. 3. Raised molding helps contain spills and prevents items like pens from rolling off.Our wheelchair tray can also be used as a support device to help users maintain their posture and support their arms. 4 Made of ABS plastic steel.will not be deformed for long-term use. 5. 90 days unconditional guarantee so you can purchase now with confidence,Only wheelchair trays are sold and do not include wheelchairs.