590406 Piston Assembly replacement for Briggs Stratton Measures approximately 4.25 x 5.00 x 8.00 inches Quality assurance: excellent design and processing.590406 Piston Assembly It is made of highly durable materials. After strict testing, it has compact structure and long service life. Super durable, high-quality substitute.590406 Piston Assembly Made of durable high quality materials and fully tested by the manufacturer This is the manufacturer's replacement. The function is equivalent to the previous parts. The product description is well designed and well processed. Accurate matching and wise choice. Our reliable accessories can keep your gear running smoothly. Please confirm your model before ordering. Carefully check the dimensions and photos for suitability.