Base Jack Material: Q235 Surface treatment: Hot dip galvanized,electro- galvanized,painted Color: Silver,red or as your requirement Emboss: Available Packaging: Packed with steel stripsfilm or as customer's requst. Application: Outdoor Building Construction Malleable Scaffold Coupler YXSY adjustable bases give stability to the structure with desired adjustments at the base. Base Jack used as the base of the scaffolding system, to adjust the rough ground into the same level, and stabilize the system. 1.Advanced structural design.  2.Heavy load bearing capacity, durable & stable. 3.Single scaffold kit, no extra clamps or accessories required, no small parts.