Yung Chi Y.C. Industrial CI. was established in 1975, specialized in manufacturing as well as repairing sprayer equipment. In 1992, we began to design and produce knapsack power sprayers and portable power sprayers. We are experienced in agricultural systems and believe a good portable sprayer is comfortable to use and efficient. All components of Knapsack power sprayers have passed chemical and durability tests. Over the years, our products have been sold to overseas countries and regions for agricultural and gardening purposes. Please feel free to contact us at Yung Chi for any inquiry about our fine products.