two meter is available to this line, two point five meter is a valiable to this line, three meter is avaliable to this line, three point five meter is avaliable to this line, four meter is available to this line, four point five meter is avaliable to this line. As people pay more and more attention to environment protection, production of steel pretreatment lines grows rapidly in China, along with a higher economic benefit.Shot-blasting for the workpiece surface is a critical step for steel pretreatment line.The steel width can be designed & made in accordance with customer's request. To enhance production effciency, steel pretreament factories in Shanghai and Zhejiang have put two sheets together for treatment-four point five meter is avaliable to this line.Controlled by conventional method or PLC.