The 4x4 Flag Kits include frames made of 3/8" Stainless Steel tubing with Stainless Steel connector pins. An elastic cord keep all the pieces together even when collapsed. Bag contains a Stainless Steel tube sewn into the bottom to keep the bag rigid and allows the bag to be hung from the "T" handle on a stand. The bag is made of 1000 Denier Cordex black textured nylon, with a yellow polyester interior. Eight pockets (5 small, 3 medium) are provide to store Covers. A zipper securely keeps everything safe. Any 4x4 SLIPPER can be used on these frames.