If you already have your own projector and just need the screen to fit in the poptop of your campervan, this sturdy compact projector screen is perfect for the job. Easy to set up, it sits freestanding, but secure, in the open end of the pop top.  When not in use it retracts into its own hard case, for safe and easy storage. Our campervan screens also come with a carry bag for further protection and convenience.  
Clear Projection & Wide Viewing Angle - 4:3 aspect ratio
Diagonal size: 50"
See photo for dimensions.