Detail:auto repair shelter,portable workstation,outdoor car garage,mobile spray booth, etc.1-We make lots of D-ring which used for fix tent in wind day.2-Four openable or sealable windows. 3-There are 2-3 zipper on the tent,they are make the tent deflate so fast.??Below more product photo produced by us.???Customized can be acceptable,if any idea,just feel free to tell us!