1.) non-toxic materials meets safety standards. 2.) high-reflective +95% silver Mylar with Nylon fabric. 3.) 600D and 210D for your own choice. 4.) white powder coating steel tube 16mm dia. x 0.8mm thick. If you need thinner 0.7mm steel tubes to get the product lighter, it is also arrangable 5.) make to order to meet Buyer's requests! 6.) min. order q'ty is 50pcs each size. 7.) extra plastics corner connectors are FREE of charge upon your request with each shipping. 8.) steel-made corner connectors are available upon request! 9.) light-proof stitching with excellent workmanship.