GetTent.com has largest selection of in stock Frame Tent Tubing in the USA. Frame Tube is the structural member used to construct the frame work of a frame tent. Common tube lengths are interchangeable between tent sizes. Tubing is available in 4 configurations: Aluminum Single Tube (AST), Aluminum Double Tube (ADT), Galvanized Single Tube (GST), and Keder Single Tube (KST) which is commonly used for legs or uprights for a tent. This tubing is not used for pole tents.