Company Profile Anhui Changqing Electronic and Machine(Group) Co ,Ltd is one of the biggest manufacturers of scaffolding in the Eastern Region of China no matter which side especially in service, performance and quality.We are the expert in designing and producing all kinds of scaffolding and formwork systems, including the Ringlock (All-round), Cuplock , Kwikstage, Couplers, Frames, Shoring props, etc.Product DescriptionA:Types of Screw Jack:1. hollow screw jack:32/34/38x4mmx500/600/700mm2. solid screw jack:32/34mmx500/600/700mm3. U-head screw jack4. Plate specification:120x120x5mm/139x139x6mm/150x150x6mmB:Normal Specification :1.hollow screw jack:34x4x600mm,150x150x6mm, Weight:3.42kgs2.solid screw jack:32x600mm,150x150x6mm, Weight:5.5kgs3.hollow screw jack:48x6x900mm,150x150x6mm,Weight:7.37kgs4.127x127x6mm, 35x2x105, Weight;0.92kgs5.178x229x8mm, 603.576.2,Weight:2.93kgsC:Surface Treatment:self color/galvanized(electroplated,zinc plate