The Heavy Duty Stainless Steel 180mm Plunger is a premium-quality replacement part designed specifically for 139F power sprayers. Built with high-grade stainless steel, it ensures durability, corrosion resistance, and long-lasting performance under continuous and demanding spraying operations. The plunger’s precision-engineered design allows smooth reciprocation, delivering consistent high pressure for uniform spraying of pesticides, herbicides, fertilizers, or disinfectants in agricultural and horticultural applications. At 180mm length, it offers a perfect fit for standard 139F pump models, making replacement and installation convenient. A reliable spare part, this plunger restores your sprayer’s working efficiency and extends its service life, eliminating the need for frequent maintenance. It is a must-have for farmers, gardeners, and professionals relying on effective and uninterrupted spraying tasks.