The Scaffolding Frames Vertical Tubes is always Made by OD42.7mm Steel Scaffold Tube with 4 pcs of Flip Scaffolding Lock Pin and 2 PCS of Joint Pins. 
Frame Scaffolding System Components Include Cross Braces, Metal Scaffold Planks, Cat Walking Board, Scaffold Stairs, Jack Base and U Head Jacks. 
Scaffolding Jack Base and U Head Jacks are Made of Solid Screw Thread with Cast Jack Nut. 
Scaffolding Stairs could be Pre-galvanized and Hot Dip Galvanized Finishing.